#include <bits/stdc++.h>
using namespace std;

int main() {
  long long n, k;
  cin >> n >> k;
  long long m = n - k;
  int count = 0;
  for (long long i = 1; i * i <= m; i++) {
    if (m % i == 0) {
      count += (n % i) == k;
      if (i * i != m) {
	count += (n % (m / i)) == k;
      }
    }
  }
  cout << count << '\n';
  return 0;
}