func_code_string: #include <bits/stdc++.h>   using namespace std;   std::map<long long, long long> factors;   void primeFactors(long long n) {     while (n % 2 == 0) {       factors[2]++;       n = n / 2;     }     for (long long i = 3; i <= sqrt(n); i = i + 2) {       while (n % i == 0) {         factors[i]++;         n = n / i;       }     }     if (n > 2) factors[n]++;   }   long long i, j;   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long n;     cin >> n;     long long ans = 0;     for (i = 2; i <= n; i++) {       long long x = n / (i);       ans += (i) * (x - 1);     }     cout << ans * 4 <<   n ;     return 0;   }   