//Nguyen Huu Hoang Minh
#include <bits/stdc++.h>
#define sz(x) int(x.size())
#define all(x) x.begin(),x.end()
#define reset(x) memset(x, 0,sizeof(x))
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define N 100005
#define remain(x) if (x > MOD) x -= MOD
#define ii pair<int, int>
#define iiii pair< ii , ii >
#define viiii vector< iiii >
#define vi vector<int>
#define vii vector< ii >
#define bit(x, i) (((x) >> (i)) & 1)
#define Task "TIRES"
#define int long long

using namespace std;

typedef long double ld;
const int inf = 1e10;
const int minf = -1e10;

int n;
int a[N];
int cnt[N];

void readfile()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);cout.tie(0);
    if (fopen(Task".inp","r"))
    {
        freopen(Task".inp","r",stdin);
        //freopen(Task".out","w",stdout);
    }
    cin >> n;
    n++;
    for(int i=1; i<=n; i++) cin >> a[i];
}

void proc()
{
    sort(a+1,a+1+n);
    vector<int> res;
    for(int i=n; i>=1; i--){
        bool ok = true;
        for(int j=a[i]; j<=1e5; j+=a[i]){
            if (cnt[j]){
                ok = false;
                break;
            }
        }
        if (ok) res.pb(a[i]), cnt[a[i]]=1;
    }
    int ans = 0;
    for(auto x : res) ans+=x-1;
    cout << ans;
}

signed main()
{
    readfile();
    proc();
    return 0;
}