func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1000000007;   const long long inf = 1e14;   long long gcd(long long a, long long b) { return (b == 0 ? a : gcd(b, a % b)); }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     cout.tie(NULL);     long long n, ans = 0;     cin >> n;     for (long long i = 2; i <= n; i++) {       for (long long j = i + i; j <= n; j += i) {         ans += (j / i);       }     }     cout << ans * 4;     return 0;   }   