def divisors(n: int):
    upper = []
    lower = []
    i = 1
    while i * i <= n:
        if n % i == 0:
            lower.append(i)
            if i != n // i:
                upper.append(n // i)
        i += 1
    return lower + upper[::-1]


n, k = map(int, input().split())
x = n - k
ans = 0
d = divisors(x)
for di in d:
    if di <= k:
        continue
    ans += 1
print(ans)