import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		long n = sc.nextLong();
		long k = sc.nextLong();
		sc.close();

		long ans = 0;
		long end = (long) Math.sqrt(k);
		for (int i = 2; i <= end; i++) {
			if (k % i == 0) {
				long m1 = Math.min(i - 1, n);
				long v1 = Math.max(m1 - (i - 1 - m1), 0);

				long i2 = k / i;
				long m2 = Math.min(i2 - 1, n);
				long v2 = Math.max(m2 - (i2 - 1 - m2), 0);

				ans += v1 * v2;
			}
		}
		System.out.println(ans * 2);
	}
}