#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all>
using namespace atcoder;
using mint=modint998244353; //1000000007;
using ll=long long;
using pp=pair<int,int>;
#define sr string 
#define vc vector
#define fi first
#define se second
#define rep(i,n) for(int i=0;i<(int)n;i++)
#define pb push_back
#define all(v) v.begin(),v.end()
#define pque priority_queue
#define bpc(a) __builtin_popcount(a)
int main(){
  int n;cin>>n;
  mint ans=0;
  for(int j=1;j<=n;j++)for(int d=1;d*j<=n;d++){
    int up=min(n+1,j*(d+1));
    up-=d*j;
    ans+=mint(d)*up;
  }
  cout<<ans.val();
}