#include<bits/stdc++.h>
using namespace std;
void ss(int n){
	cout<<n<<":";
	for(int i=1;i<=n;i++){
		if(n%i==0){
			cout<<i<<" ";
		}
	}
	cout<<endl;
}
int main()
{
	int n,i;
	cin>>n;
	for(i=1;i<=n;i++){
		ss(i);
	}
	return 0;
}

/**************************************************************
	Problem: 1519
	User: zzz
	Language: C++
	Result: Accepted
	Time:10 ms
	Memory:2072 kb
****************************************************************/