#include"atcoder/modint"
#include<bits/stdc++.h>
using namespace std;
int main(){
  cin.tie(0)->sync_with_stdio(0);
  using mint=atcoder::modint998244353;
  int N;cin>>N;
  mint ans;
  for(int i=1;i<=N;++i){
    for(int j=i;j<=N;j+=i){
      ans+=mint::raw(min(i,N-j+1))*mint::raw(j/i);
    }
  }
  cout<<ans.val()<<endl;
}