import java.util.Scanner;

public class Garden {
    public static void main(String[] args) {
        var sc = new Scanner(System.in);
        long n = sc.nextLong();
        long m = sc.nextLong();

        long result = 0;

        for (long i = n; i <= m; i++) {
            long x = count(i);
            result += x;

            //System.out.println(result);
        }
        System.out.println(result);


    }

    public static long count(long n) {
        long result = 0;

        for (long i = 1; i <= n; i++) {
            if (n % i == 0) {
                result++;
            }
        }
        return result;
    }
}