#include<bits/stdc++.h>
using namespace std;
#include <atcoder/all> 
using namespace atcoder;
using mint = modint998244353;
#define int long long
int gcd_f(int x, int y) {
  if(x < y) swap(x,y);
  if(y == 0) return x;
  if(x%y == 0) return y;
  else return gcd_f(y,x%y);
}
struct Segtree {
  vector<vector<mint>> num;
  vector<int> p;
  int n;
  Segtree(int N) {
    n = N;
    num.resize(n);
    p.resize(n+1);
    p[0] = 1;
    for(int i = 0; i < n; i++) p[i+1] = p[i]*2;
    for(int i = 0; i < n; i++) num[i].assign(p[i],0);
  }
  void add(int x, mint y) {
    num[n-1][x] = num[n-1][x]+y;
    int t = x;
    for(int i = n-2; i >= 0; i--) {
      t/=2;
      num[i][t] = num[i+1][t*2]+num[i+1][t*2+1];
    }
  }
  mint sum_calc(int t, int l, int r, int x, int y) {
    int m = (l+r)/2;
    if(t == n) return 0;
    if(x <= l && r <= y) return num[t][l/p[n-t-1]];
    if(r <= x || y <= l) return 0;
    return sum_calc(t+1,l,m,x,y)+sum_calc(t+1,m,r,x,y);
  }
  mint sum(int l, int r) {
    return sum_calc(0,0,p[n-1],l,r);
  }
};

int m;
signed main() {
  int n;
  cin >> n >> m;
  vector<int> a(n);
  for(int i = 0; i < n; i++) cin >> a[i];
  int e = 300;
  mint ans = 0;
  vector<mint> g(n+1,1),h(n,0), h2(n);
  for(int i = 0; i < n; i++) h[i] = m/a[i], g[i+1] = g[i]*h[i], h2[i] = mint(1)/h[i];
  vector<vector<mint>> d(m+1);
  vector<vector<int>> c(m+1);
  for(int i = 0; i < n; i++) c[a[i]].push_back(i);
  for(int i = 0; i <= m; i++) {
    int l = c[i].size();
    d[i].resize(l+1,0);
    for(int j = 0; j < l; j++) d[i][j+1] = d[i][j]+mint(1)*h2[c[i][j]];
  }
  for(int i = 1; i <= n; i++) 
  e = min(e,m);
  for(int i = 0; i < n; i++) {
    for(int j = 1; j <= e; j++) {
      int f = upper_bound(c[j].begin(),c[j].end(),i)-c[j].begin();
      int z = m/a[i];
      int L = c[j].size();
      mint u = d[j][L]-d[j][f];
      int x = a[i]*j/gcd_f(a[i],j);
      ans+=(floor_sum(z,j,a[i],a[i])-m/x)*g[n]*u*h2[i];
      //cout << i << ' ' << j << ' ' << ans.val() << endl;
    }
  }
  for(int i = 0; i < n; i++) {
    if(a[i] <= e) continue;
    for(int j = 1; j <= e; j++) {
      int f = lower_bound(c[j].begin(),c[j].end(),i)-c[j].begin();
      int z = m/j;
      int L = c[j].size();
      mint u = d[j][f];
      int x = (a[i]*j/gcd_f(a[i],j));
      ans+=(floor_sum(z,j,a[i],a[i])-m/x)*g[n]*u*h2[i];
      //cout << i << ' ' << j << ' ' << ans.val() << endl;
    }
  }
  vector<vector<int>> s(m+1);
  for(int i = 0; i < n; i++) {
    if(a[i] <= e) continue;
    for(int j = a[i]; j <= m; j+=a[i]) s[j].push_back(i);
  }
  Segtree seg(17);
  for(int i = e+1; i <= m; i++) {
    int l = s[i].size();
    //cout << l << endl;
    for(int j = 0; j < l; j++) ans+=seg.sum(s[i][j]+1,n)*g[n]*h2[s[i][j]];
    for(int j = 0; j < l; j++) seg.add(s[i][j],h2[s[i][j]]);
  }
  cout << ans.val() << endl;
}