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

#define rep(i, a, b) for (int i = (int)(a); (i) < (int)(b); (i)++)
#define rrep(i, a, b) for (int i = (int)(b) - 1; (i) >= (int)(a); (i)--)
#define all(v) v.begin(), v.end()

typedef long long ll;
template <class T> using V = vector<T>;
template <class T> using VV = vector<V<T>>;


int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    constexpr char endl = '\n';

    ll n,k;
    cin >> n >> k;
    n -= k;
    ll ans = 0;
    for (ll i = 1; i * i <= n; i++) {
        if (n % i == 0) {
            if (i > k) ans++;
            if (n / i != i && n / i > k) {
                ans++;
            }
        }
    }
    cout << ans << endl;
    return 0;
}