#include <iostream>
#include <string>
#include <set>
using ll = long long;
using llu = long long unsigned;

using namespace std;

int main() {
    ll N, K;
    cin >> N >> K;

    ll tmp = N-K;
    set<ll> result;
    result.insert(tmp);
    for (ll i=1; i*i<=tmp; i++) {
        if (tmp%i == 0) {
            result.insert(i);
            result.insert(tmp/i);
        }
    }
    //for (auto x : result) { cout << x << " "; } cout << endl;
    ll smallerK = 0;
    for (auto x : result) {
        if (x <= K) { smallerK++; }
        else { break; }
    }
    cout << result.size()-smallerK << endl; return 0;
}