N, K = map(int, input().split())
N -= K

ans = 0
for i in range(1, int(N ** 0.5) + 1):
  if N % i == 0:
    if i <= K and N // i > K:
      ans += 1
    elif N // i > K:
      ans += 2
    if N == i * i and i >= K:
      ans -= 1

print(ans)