import math
N,K=map(int,input().split())
ans=0
b=[]
if N<2*K:
    ans=0
else:
    for i in range(1,int(math.sqrt(N-K))+1):
        if (N-K)%i==0:
            b.append(i)
            if (N-K)//i!=i:
                b.append((N-K)//i)
    ans=len(b)
    for a in b:
        if N%a!=K:
            ans-=1
print(ans)