#include<iostream>
using namespace std;

typedef long long ll;

ll gcd(ll a, ll b){
return b == 0 ? a : gcd(b, a%b);
}

int main(){
ll a,b;
cin >> a >> b;
ll plus = a+b;
ll ga = gcd(plus, a);
ll gb = gcd(plus, b);

ll mul = ga*gb;
cout << gcd(plus,mul)<< endl;
return 0;
}