#include<iostream>
#include<cassert>
#include<atcoder/modint>
using namespace std;
using mint=atcoder::modint998244353;
int main()
{
	ios::sync_with_stdio(false);
	cin.tie(nullptr);
	long N;cin>>N;
	long L=1;
	mint ans=0;
	while(L<=N)
	{
		long q=N/L;
		long rL=N/q;
		if(mint(q).val()==1)ans+=rL-L+1;
		else ans+=mint(q).pow(L)*(mint(q).pow(rL-L+1)-1)/(q-1);
		L=rL+1;
	}
	cout<<ans.val()<<endl;
}