#include <stdio.h>
#include <atcoder/all>
#include <bits/stdc++.h>
using namespace std;
using namespace atcoder;
using mint = modint998244353;
#define rep(i,n) for (int i = 0; i < (n); ++i)
#define Inf32 1000000001
#define Inf64 1000000000000000000LL

int main(){
	int N,M;
	cin>>N>>M;
	int B = min(M,300);
	vector<mint> is(M+5);
	rep(i,M+5){
		if(i==0)continue;
		is[i] = mint(i).inv();
	}
	vector cnt(B+1,vector<mint>(M+1));
	for(int i=1;i<=B;i++){
		for(int j=1;j<=M;j++){
			int a0 = i-1;
			int m = j;
			int n = M/i;
			cnt[i][j] = floor_sum(n,m,i,a0);
			cnt[i][j] *= is[M/i] * is[M/j];
		}
	}
	vector<mint> num(B+1);
	vector<int> a(N);
	rep(i,N)scanf("%d",&a[i]);
	
	fenwick_tree<mint> fw(M+1);
	mint ans = 0;
	rep(i,N){
		//small, *
		for(int j=1;j<=B;j++){
			ans += num[j] * cnt[j][a[i]];
		}
		
		//big big
		/*
		for(int j=a[i];j<=M;j+=a[i]){
			ans += fw.sum(j+1,M+1)*is[M/a[i]];//mint(M/a[i]);
		}
		*/
		if(a[i]<=B)num[a[i]]++;
		else{
			/*
			for(int j=a[i];j<=M;j+=a[i]){
				fw.add(j,is[M/a[i]]);//mint(M/a[i]).inv());
			}
			*/
		}
	}
	num.assign(B+1,0);
	reverse(a.begin(),a.end());
	for(int i=1;i<=B;i++){
		for(int j=1;j<=M;j++){
			int a0 = j-1;
			int m = i;
			int n = M/j;
			cnt[i][j] = floor_sum(n,m,j,a0);
			cnt[i][j] *= is[M/i] * is[M/j];//mint(M/i) * mint(M/j);
		}
	}
	rep(i,N){
		//big, small
		if(a[i]>B){
			for(int j=1;j<=B;j++){
				ans += num[j] * cnt[j][a[i]];
			}
		}
		else num[a[i]]++;
	}
	rep(i,N)ans *= mint(M/a[i]);
	cout<<ans.val()<<endl;
	return 0;
}