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

#include<atcoder/all>
using namespace atcoder;

using mint=atcoder::modint998244353;

int main(){
	int n,m;cin>>n>>m;
	vector<int> d(n);for(auto&&e:d)cin>>e;
	mint prod=1;for(auto&&e:d)prod*=m/e;
	mint ans=0;
	for(int i=0;i<n;i++){
		for(int j=i+1;j<n;j++){
			mint tprod=prod/(m/d[i])/(m/d[j]);
			ans+=tprod*floor_sum(m/d[i],d[j],d[i],d[i]-1);
		}
	}
	cout<<ans.val()<<"\n";
}