#include <atcoder/all>
#include <bits/stdc++.h>
#define rep(i, a, b) for (ll i = (ll)(a); i < (ll)(b); i++)
using namespace atcoder;
using namespace std;

typedef long long ll;

template <class T, class S = T> struct AllPairOperationSum {
    // https://shakayami.hatenablog.com/entry/2021/01/01/044946
    // Σ op(a[i], a[j]) (i < j)
    ll n;
    vector<T> a;
    AllPairOperationSum() {}
    AllPairOperationSum(vector<T> a) : a(a), n(a.size()) {}
    T floor() {
        // floor(A / B)
        // O(N √maxA log maxA)
        T maxa = *max_element(a.begin(), a.end());
        T sqrtmaxa = sqrt(maxa);
        vector<T> v(sqrtmaxa, 0);
        fenwick_tree<T> ft(maxa + 1);
        T ret = 0;
        rep(i, 0, n) {
            if (a[i] < sqrtmaxa) {
                ret += v[a[i]];
            } else {
                for (T k = 0; k < maxa + 1; k += a[i]) {
                    ret += (k / a[i]) * ft.sum(k, std::min(k + a[i], maxa + 1));
                }
            }
            ft.add(a[i], 1);
            for (T j = 1; j < sqrtmaxa; j++) {
                v[j] += a[i] / j;
            }
        }
        return ret;
    }
};

int main() {
    ll n;
    cin >> n;
    vector<ll> a(n);
    rep(i, 0, n) a[i] = i + 1;
    reverse(a.begin(), a.end());
    AllPairOperationSum<ll> op(a);
    ll ans = op.floor() + n;
    ans %= 998244353;
    cout << ans << endl;
}