def solver(x):
  div_cnt = 0
  for i in range(1, int(x**0.5) + 1):
    if x%i == 0:
      if K < i:
        div_cnt += 1
      if (x//i != i) and (K < x//i):
        div_cnt += 1
  return div_cnt

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