func_code_string: #include <bits/stdc++.h>   using llong = long long;   using namespace std;   set<llong> factors;   void f(llong num) {     factors.insert(1);     llong to = sqrt(num);     for (auto i = 2; i <= to; ++i) {       if (num % i == 0) {         factors.insert(i);         factors.insert(num / i);       }     }     factors.insert(num);   }   int main() {     ios_base::sync_with_stdio(false);     cout.tie(0);     cin.tie(0);     llong n;     cin >> n;     f(n);     set<llong> res;     for (auto e : factors) {       res.insert((n + 1 + 1) * (n / e + 1) / 2 - (n + 1));     }     for (auto i : res) cout << i <<    ;     return 0;   }   