def make_divisors(n):
    lower_divisors , upper_divisors = [], []
    i = 1
    while i*i <= n:

        if n % i == 0:
            if i > K:
                lower_divisors.append(i)
            if i != n // i and n // i > K:
                upper_divisors.append(n//i)
        i += 1

    return lower_divisors + upper_divisors[::-1]

N, K = list(map(int, input().split()))
ans = make_divisors(N-K)
# print(ans)
print(len(ans))