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



int main() {
    cin.tie(0);
    ios::sync_with_stdio(0);
    int n;
    long long k;
    cin >> n >> k;
    unordered_map<long long, int> dp;
    dp.reserve(210000);
    dp[k] = 1;
    for (int i = 1; i <= n; ++i) {
        vector<pair<long long, int>> v;
        for (pair<long long, int> j : dp) {
            v.push_back(j);
        }
        for (auto& j : v) {
            if (j.first >= i) {
                dp[j.first / i] += j.second;
            }
        }
    }
    long long ans = 0;
    for (auto& i : dp) {
        ans += i.second;
    }
    cout << ans - 1 << '\n';
    return 0;
}