#include <bits/stdc++.h>
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
using namespace std;
vector<int> Pr = {
    0,    2,    3,    5,    7,    11,   13,   17,   19,   23,   29,   31,
    37,   41,   43,   47,   53,   59,   61,   67,   71,   73,   79,   83,
    89,   97,   101,  103,  107,  109,  113,  127,  131,  137,  139,  149,
    151,  157,  163,  167,  173,  179,  181,  191,  193,  197,  199,  211,
    223,  227,  229,  233,  239,  241,  251,  257,  263,  269,  271,  277,
    281,  283,  293,  307,  311,  313,  317,  331,  337,  347,  349,  353,
    359,  367,  373,  379,  383,  389,  397,  401,  409,  419,  421,  431,
    433,  439,  443,  449,  457,  461,  463,  467,  479,  487,  491,  499,
    503,  509,  521,  523,  541,  547,  557,  563,  569,  571,  577,  587,
    593,  599,  601,  607,  613,  617,  619,  631,  641,  643,  647,  653,
    659,  661,  673,  677,  683,  691,  701,  709,  719,  727,  733,  739,
    743,  751,  757,  761,  769,  773,  787,  797,  809,  811,  821,  823,
    827,  829,  839,  853,  857,  859,  863,  877,  881,  883,  887,  907,
    911,  919,  929,  937,  941,  947,  953,  967,  971,  977,  983,  991,
    997,  1009, 1013, 1019, 1021, 1031, 1033, 1039, 1049, 1051, 1061, 1063,
    1069, 1087, 1091, 1093, 1097, 1103, 1109, 1117, 1123, 1129, 1151, 1153,
    1163, 1171, 1181, 1187, 1193, 1201, 1213, 1217, 1223, 1229, 1231, 1237,
    1249, 1259, 1277, 1279, 1283, 1289, 1291, 1297, 1301, 1303, 1307, 1319,
    1321, 1327, 1361, 1367, 1373, 1381, 1399, 1409, 1423, 1427, 1429, 1433,
    1439, 1447, 1451, 1453, 1459, 1471, 1481, 1483, 1487, 1489, 1493, 1499,
    1511, 1523, 1531, 1543, 1549, 1553, 1559, 1567, 1571, 1579, 1583, 1597,
    1601, 1607, 1609, 1613, 1619, 1621, 1627, 1637, 1657, 1663, 1667, 1669,
    1693, 1697, 1699, 1709, 1721, 1723, 1733, 1741, 1747, 1753, 1759, 1777,
    1783, 1787, 1789, 1801, 1811, 1823, 1831, 1847, 1861, 1867, 1871, 1873,
    1877, 1879, 1889, 1901, 1907, 1913, 1931, 1933, 1949, 1951, 1973, 1979,
    1987, 1993, 1997, 1999, 2003, 2011, 2017, 2027, 2029, 2039, 2053, 2063,
    2069, 2081, 2083, 2087, 2089, 2099, 2111, 2113, 2129, 2131, 2137, 2141,
    2143, 2153, 2161, 2179, 2203, 2207, 2213, 2221, 2237, 2239, 2243, 2251,
    2267, 2269, 2273, 2281, 2287, 2293, 2297, 2309, 2311, 2333, 2339, 2341,
    2347, 2351, 2357, 2371, 2377, 2381, 2383, 2389, 2393, 2399, 2411, 2417,
    2423, 2437, 2441, 2447, 2459, 2467, 2473, 2477, 2503, 2521, 2531, 2539,
    2543, 2549, 2551, 2557, 2579, 2591, 2593, 2609, 2617, 2621, 2633, 2647,
    2657, 2659, 2663, 2671, 2677, 2683, 2687, 2689, 2693, 2699, 2707, 2711,
    2713, 2719, 2729, 2731, 2741, 2749, 2753, 2767, 2777, 2789, 2791, 2797,
    2801, 2803, 2819, 2833, 2837, 2843, 2851, 2857, 2861, 2879, 2887, 2897,
    2903, 2909, 2917, 2927, 2939, 2953, 2957, 2963, 2969, 2971, 2999, 3001,
    3011, 3019, 3023, 3037, 3041, 3049, 3061, 3067, 3079, 3083, 3089, 3109,
    3119, 3121, 3137, 3163, 3167, 3169, 3181, 3187, 3191, 3203, 3209, 3217,
    3221, 3229, 3251, 3253, 3257, 3259, 3271, 3299, 3301, 3307, 3313, 3319,
    3323, 3329, 3331, 3343, 3347, 3359, 3361, 3371, 3373, 3389, 3391, 3407,
    3413, 3433, 3449, 3457, 3461, 3463, 3467, 3469, 3491, 3499, 3511, 3517,
    3527, 3529, 3533, 3539, 3541, 3547, 3557, 3559, 3571, 3581, 3583, 3593,
    3607, 3613, 3617, 3623, 3631, 3637, 3643, 3659, 3671, 3673, 3677, 3691,
    3697, 3701, 3709, 3719, 3727, 3733, 3739, 3761, 3767, 3769, 3779, 3793,
    3797, 3803, 3821, 3823, 3833, 3847, 3851, 3853, 3863, 3877, 3881, 3889,
    3907, 3911, 3917, 3919, 3923, 3929, 3931, 3943, 3947, 3967, 3989, 4001,
    4003, 4007, 4013, 4019, 4021, 4027, 4049, 4051, 4057, 4073, 4079, 4091,
    4093, 4099, 4111, 4127, 4129, 4133, 4139, 4153, 4157, 4159, 4177, 4201,
    4211, 4217, 4219, 4229, 4231, 4241, 4243, 4253, 4259, 4261, 4271, 4273,
    4283, 4289, 4297, 4327, 4337, 4339, 4349, 4357, 4363, 4373, 4391, 4397,
    4409, 4421, 4423, 4441, 4447, 4451, 4457, 4463, 4481, 4483, 4493, 4507,
    4513, 4517, 4519, 4523, 4547, 4549, 4561, 4567, 4583, 4591, 4597, 4603,
    4621, 4637, 4639, 4643, 4649, 4651, 4657, 4663, 4673, 4679, 4691, 4703,
    4721, 4723, 4729, 4733, 4751, 4759, 4783, 4787, 4789, 4793, 4799, 4801,
    4813, 4817, 4831, 4861, 4871, 4877, 4889, 4903, 4909, 4919, 4931, 4933,
    4937, 4943, 4951, 4957, 4967, 4969, 4973, 4987, 4993, 4999};
int dist[5010][5010], pr[5010][5010], pr_mx[5010];
int c1[5010], c2[5010][710];
int n, k[1000010];
long long ans = (1ll << 60);
void f(int st) {
  long long s1 = 0, s2 = 0, s3 = c1[st];
  for (int i = 0; i <= 5000; i++)
    if (st != i)
      s1 += (long long)c1[i] * (dist[st][i] + dist[i][st]), s2 += c1[i];
  for (int i = 0, j = st - 1, k = st + 1; i <= c2[st][669]; i++) {
    while (j >= 0 && dist[st][j] <= i) {
      s3 += c1[j];
      s2 -= c1[j];
      j--;
    }
    while (k <= 5000 && dist[st][k] <= i) {
      s3 += c1[k];
      s2 -= c1[k];
      k++;
    }
    ans = min(ans, s1);
    s1 += s3;
    s1 -= s2;
  }
  ans = min(ans, s1);
}
int main() {
  for (int i = 1; i <= 5000; i++) {
    for (int j = 669; j >= 1; j--)
      if (i % Pr[j] == 0) {
        pr_mx[i] = j;
        break;
      }
  }
  for (int i = 0; i <= 5000; i++)
    for (int j = i + 1; j <= 5000; j++) {
      pr[i][j] = max(pr[i][j - 1], pr_mx[j]);
    }
  for (int i = 1; i <= 5000; i++)
    for (int j = i, k = 1; k <= 669; k++) {
      c2[i][k] = c2[i - 1][k];
      while (j % Pr[k] == 0) {
        j /= Pr[k];
        c2[i][k]++;
      }
    }
  for (int i = 1; i <= 5000; i++)
    for (int j = 1; j <= 669; j++) c2[i][j] += c2[i][j - 1];
  for (int i = 0; i <= 5000; i++)
    for (int j = i + 1; j <= 5000; j++) {
      if (!pr[i][j]) continue;
      dist[i][j] = c2[i][pr[i][j] - 1];
      dist[j][i] = c2[j][pr[i][j]] - c2[i][pr[i][j]] + c2[i][pr[i][j] - 1];
    }
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    scanf("%d", &k[i]);
    c1[k[i]]++;
  }
  for (int i = 0; i <= 5000; i++)
    if (c1[i]) f(i);
  printf("%lld\n", ans);
  return 0;
}
