from itertools import count


def main():
    n, k = map(int, input().split())
    ans = 0
    for i in count(1):
        if i*i > n-k:
            break
        if (n-k) % i == 0:
            if i > k:
                ans += 1
            if i*i != (n-k) and (n-k) // i > k:
                ans += 1
    print(ans)


if __name__ == '__main__':
    main()