#include <iostream>
#include <stdio.h>
#include <cstring>
#include <math.h>
#include <algorithm>
#include <vector>
#define rep(i,n) for(int i=0;i<n;i++)
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define ll long long
#define LL long long
#define mass 1000000007
using namespace std;


int main(){
	ll x;
	cin>>x;
	ll y=1;
	for(ll i=2;x>1;i++){
		if(x%i==0){
			x/=i;
			if(y%i==0){
				y/=i;
			}else{
				y*=i;
			}
			i--;
		}
	}
	cout<<y<<endl;

	return 0;
	

}