#include "bits/stdc++.h"
using namespace std;
#define ll long long
#define endl '\n'
#define rep(i, n) for(int i = 0; i < (int)(n); i++)
#define rep2(i,a,b) for(int i=int(a);i<int(b);i++)
#define pb emplace_back
#define all(x) (x).begin(),(x).end()
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;
//g++ -std=c++11 a.cpp

signed main(){
	ll a;

    vector<ll> isgd(300000,1);
    for(ll i=6;i<=sqrt(300000);){
        if(isgd[i]==1){
            for(ll j=i+i;j<300000;j+=i)isgd[j]=0;
        }
        i+=2;
        if(isgd[i]==1){
            for(ll j=i+i;j<300000;j+=i)isgd[j]=0;
        }
        i+=5;
    }
    
    vector<ll> gds;
    rep2(i,2,300000)if((i%7==1||i%7==6)&&isgd[i]){
        gds.pb(i);
        //cout<<i<<endl;
    }

    while(1){
        cin>>a;
        if(a==1)break;
        cout<<a<<": ";
        bool f=false;
        rep(i,gds.size())if(a%gds[i]==0){
            if(f)cout<<" ";
            cout<<gds[i];
            f=true;
        }
        cout<<endl;
    }
}

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