def div(n):
    if n <= 0:
        return []
    S = set()
    i = 1
    while i * i <= n:
        if n % i == 0:
            S.add(i)
            S.add(n // i)
        i += 1
    return list(S)

N, K = map(int, input().split())
ans = 0
for d in div(N - K):
    if d > K:
        ans += 1
print(ans)