func_code_string: #include <bits/stdc++.h>   int main() {     int n;     std::cin >> n;     long long sum = 0;     int j;     for (int i = 2; i <= n / 2; i++) {       j = 2;       while (i * j <= n) {         sum += j;         j++;       }     }     sum = sum * 4;     std::cout << sum;   }   