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

using ll = long long;
const ll MOD = 998244353;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    ll N;
    cin >> N;

    ll ans = 0;

    for (ll x = 1; x <= N; x++) {
        ll cur = x;
        int cnt = 0;

        while (cur <= N) {
            cnt++;
            if (cur > N / x) break;
            cur *= x;
        }

        ans = (ans + x % MOD * cnt) % MOD;
    }

    cout << ans << '\n';
}