#include <stdio.h>

unsigned long long int gcd(unsigned long long int a, unsigned long long int b){
    unsigned long long int r = a % b;
    if(r == 0){
        return b;
    }else{
        return gcd(b, r);
    }
}

int main(){
    unsigned long long int a, b;
    scanf("%llu %llu", &a, &b);
    unsigned long long int atb = a + b;
    unsigned long long int axb = a * b;
    unsigned long long int answer = gcd(axb, atb);
    printf("%llu", answer);
    return 0;
}