#include <stdio.h>

unsigned long long int gcd(unsigned long long int a,unsigned long long int b){
	unsigned long long int temp,r;
	while(1){
		if(a>b){
			temp=a;
			a=b;
			b=temp;
		}
		else{
			r=b%a;
			if(r==0)
				break;
			b=r;
		}
	}
	return a;
}

int main(){
	unsigned long long int A,B;
	scanf("%llu %llu",&A,&B);

	unsigned long long int a,gcd_ab,gcd_aa,eq_gcd,calc;
	a=A+B;

	gcd_aa=gcd(a,A);
	gcd_ab=gcd(a,B);
	eq_gcd=gcd(gcd_ab,gcd_aa);

	calc = gcd_ab*gcd_aa/eq_gcd;
	unsigned long long int i=1;
	while(1){
		if(calc>=a){
			calc /=i-1;
			break;
		}
		else if(i>eq_gcd)
			break;
		if(gcd(i,eq_gcd)==i && gcd(calc*i,a)==calc*i){
			calc *= i;
			eq_gcd/=i;
		}
		i++;
	}



	printf("%llu\n",calc);
	return 0;
}