//
// Created by DELLPC on 24-5-19.
//

#include "bits/stdc++.h"

using namespace std;


using i64 = long long;
using i32 = unsigned int;
#define  endl '\n'
i64 mod = 998244353;

i64 dfs(i64 a, i64 b) {
    if (a > b) return 0;
    int ans = 1;
    for (i64 i = 2; i <= 201210926; i++) {
        if (i * a >  b) break;
        ans += dfs(a * i, b);
    }
    return ans;
}


void solve() {
    i64 n, m;
    cin >> n;
    cout << dfs(1, n) << endl;

}

int main() {
//    cerr    << 1996488708ll * 2ll %mod<<endl;
    ios::sync_with_stdio(0), cin.tie(0);
    int t = 1;
//    cin >> t;
    while (t--) {
        solve();
    }


}