func_code_string: #include <bits/stdc++.h>   using namespace std;   long long fac[1000001];   int main() {     long long n, ans = 0, c = 0, mx = 0, tmp, tmp2, lg;     cin >> n;     for (long long i = 2; i < n; i++) {       tmp = n / i;       tmp = tmp * (tmp + 1) / 2 - 1;       ans += (tmp * 4);     }     cout << ans <<   n ;     return 0;   }   