#include <iostream>

using namespace std;
using ll = long long;

int main () {
    ll N; cin >> N;
    const ll MOD = 998244353;

    // 割った切り捨ての種類数は十分少ない典型
    // -> N√Nくらい

    ll ans = 0;
    for (int i = 1; i <= N; i++) {
        int cur = 1;
        while (true) {
            ans += 1LL * cur * ((i / cur) - (i / (cur + 1) + 1) + 1) % MOD;
            ans %= MOD;

            int div = i / (cur + 1);
            if (div == 0) break;

            cur = i / div;
        }
    }

    cout << ans << "\n";
}