#include<bits/stdc++.h>
using namespace std;
int n;
int main(){
cin>>n;
for(int i=1;i<=n;i++){
cout<<i<<":";
for(int j=1;j<=i;j++){
if(i%j==0){
cout<<j<<" ";
}
}
cout<<endl;
}
return 0;
}
/**************************************************************
Problem: 1519
User: guoyixuan
Language: C++
Result: Accepted
Time:10 ms
Memory:2072 kb
****************************************************************/