import java.util.*;

public class Main {
	public static void main (String[] args) {
    	Scanner sc = new Scanner(System.in);
    	long a = sc.nextLong();
    	long b = sc.nextLong();
    	long c = a + b;
    	HashMap<Long, Integer> map = new HashMap<>();
    	long ans = 1;
    	for (long i = 2; i <= Math.sqrt(c); i++) {
    	    while (c % i == 0) {
    	        if (a % i == 0) {
    	            ans *= i;
    	            a /= i;
    	        } else if (b % i == 0) {
    	            ans *= i;
    	            b /= i;
    	        }
    	        c /= i;
    	    }
    	}
    	if (a % c == 0) {
    	    ans *= c;
    	} else if (b % c == 0) {
    	    ans += c;
    	}
    	System.out.println(ans);
    }
}