#include<iostream> 
#include<cmath> 
#include<cstdio> 
#include<algorithm> 
#include<cstring>
#include<string> 
using namespace std;
int main(){
	int n;
	cin >> n;
	int res;
	for(int i=2;i<=n;i++){
		res = 0;
		for(int j=1;j<i;j++){
			if(i%j == 0){
				res+=j;
			}
		}
		if(i==res){
			cout << i << endl;
		}
	}
	return 0;
}