#include <bits/stdc++.h>
using namespace std;
#define int long long
#define pb push_back
#define all(v) v.begin(), v.end()
void solve() {
int n, k; cin >> n >> k;
int sum = 0;
set<int> st;
for(int i = 1; i <= n; i++) {
int x; cin >> x;
st.insert(x);
}
for(auto &x : st) {
for(int i = 1; i <= k; i++) {
int a = x / i;
sum += min((int)1e8, a * (x + 2));
}
}
cout << sum << '\n';
}
signed main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
int T = 1;
//cin >> T;
while (T--) solve();
}
