from sys import stdin
input=lambda :stdin.readline()[:-1]

def divisors(n):
  lower,upper=[],[]
  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())
ans=0
for d in divisors(n-k):
  if n%d==k:
    ans+=1
print(ans)