func_code_string: #include <bits/stdc++.h>   using namespace std;   const unsigned long long INF = ~0ll;   unsigned long long prime[16] = {2,  3,  5,  7,  11, 13, 17, 19,                                   23, 29, 31, 37, 41, 43, 47, 53};   int n;   unsigned long long ans;   void dfs(int deepth, unsigned long long v, unsigned long long num) {     if (num > n || deepth > 15) return;     if (num == n && v < ans) {       ans = v;       return;     }     for (unsigned long long i = 1; i <= 63; i++) {       if (ans / prime[deepth] < v) break;       dfs(deepth + 1, v *= prime[deepth], num * (i + 1));     }   }   int main() {     while (cin >> n) {       ans = INF;       dfs(0, 1, 1);       cout << ans << endl;     }     return 0;   }   