#include <iostream>

#include <cstdio>

#include <cstring>

#define LL __int64

using namespace std;

LL p[16]={2,3,5,7,11,13,17,19,23,29,31,37,41,43,47,53};

LL n,k;

void dfs(LL dep,LL tmp,LL num, LL &ans){

	if(num>k) return;

	if(num==k){

		if(tmp<ans)

		ans=tmp;

		return ;

	}

	for(LL i=1;i<=60;i++){

		if(tmp*p[dep]>ans) break;

		tmp*=p[dep];

		dfs(dep+1,tmp,num*(i+1),ans);

	}

}

int main(){

	while(scanf("%I64d",&n),n){

		k=2*n;

		LL ansi=(1LL<<60);

	//	cout<<ansi<<endl;

		dfs(0,1,1,ansi);

	//	cout<<ansi<<endl;

		k=2*n-1;

		LL ansj=(1LL<<60);

		dfs(0,1,1,ansj);

	//	cout<<ansj<<endl;

		printf("%I64d\n",ansi<ansj?ansi:ansj);

	}

	return 0;

}