func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     long long n;     cin >> t;     while (t--) {       set<long long> a;       a.insert(0);       cin >> n;       for (int i = 1; i <= sqrt(n); i++) {         a.insert(i);         a.insert(n / i);       }       cout << a.size() << endl;       for (auto i : a) cout << i <<    ;       cout << endl;     }   }   