#include<bits/stdc++.h> using namespace std; int main() { int n; cin>>n; for (int num = 2; num <= n; num++) { int sum = 1; for (int i = 2; i * i <= num; i++) { if (num % i == 0) { sum += i; if (i != num / i) sum += num / i； } } if (sum == num) cout << num << endl; } return 0; }