#include <bits/stdc++.h>

using namespace std;

using ll = long long;
using ull = unsigned long long;
using ld = long double;
using P = pair<ll, ll>;
using tp = tuple<ll, ll, ll>;

template <class T>
using vec = vector<T>;
template <class T>
using vvec = vector<vec<T>>;

#define all(hoge) (hoge).begin(), (hoge).end()
#define en '\n'
#define rep(i, m, n) for(ll i = (ll)(m); i < (ll)(n); ++i)
#define rep2(i, m, n) for(ll i = (ll)(n)-1; i >= (ll)(m); --i)
#define REP(i, n) rep(i, 0, n)
#define REP2(i, n) rep2(i, 0, n)

constexpr long long INF = 1LL << 60;
constexpr int INF_INT = 1 << 25;
// constexpr long long MOD = (ll)1e9 + 7;
constexpr long long MOD = 998244353LL;
static const ld pi = 3.141592653589793L;

#pragma GCC target("avx2")
#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")

template <class T>
inline bool chmin(T &a, T b) {
    if(a > b) {
        a = b;
        return true;
    }
    return false;
}

template <class T>
inline bool chmax(T &a, T b) {
    if(a < b) {
        a = b;
        return true;
    }
    return false;
}

//グラフ関連
struct Edge {
    int to, rev;
    ll cap;
    Edge(int _to, int _rev, ll _cap) : to(_to), rev(_rev), cap(_cap) {}
};

typedef vector<Edge> Edges;
typedef vector<Edges> Graph;

void add_edge(Graph &G, int from, int to, ll cap, bool revFlag, ll revCap) {
    G[from].push_back(Edge(to, (int)G[to].size(), cap));
    if(revFlag)
        G[to].push_back(Edge(from, (int)G[from].size() - 1, revCap));
}

class UnionFind {
    vector<int> data;
    int num;

  public:
    UnionFind(int size) : data(size, -1), num(size) {}
    bool unionSet(int x, int y) {
        x = root(x);
        y = root(y);
        if(x != y) {
            if(data[y] < data[x])
                swap(x, y);
            data[x] += data[y];
            data[y] = x;
            num--;
        }
        return x != y;
    }
    bool findSet(int x, int y) {
        return root(x) == root(y);
    }
    int root(int x) {
        return data[x] < 0 ? x : data[x] = root(data[x]);
    }
    int size(int x) {
        return -data[root(x)];
    }
    int numSet() {
        return num;
    }
};

vector<ll> divisor(ll n) {
    vector<ll> ret;
    for(ll i = 1; i * i <= n; i++) {
        if(n % i == 0) {
            ret.push_back(i);
            if(i * i != n)
                ret.push_back(n / i);
        }
    }
    sort(ret.begin(), ret.end());
    return ret;
}

void solve() {
    ll n;
    cin >> n;
    vec<ll> a(n);
    REP(i, n) {
        cin >> a[i];
    }

    ll ma = 2020202;
    vec<ll> num(ma, 0);

    vvec<int> vs(ma);
    ll ans = 0;
    sort(all(a));

    vec<ll> b;
    REP(i, n) {
        num[a[i]]++;
        if(num[a[i]] >= 2) {
            ans += a[i];
            continue;
        }

        int k = b.size();
        b.push_back(a[i]);
        for(int j = 1; j * a[i] < ma; j++) {
            vs[j * a[i]].push_back(k);
        }
    }

    UnionFind uni(b.size());
    REP(i, ma) {
        if(vs[i].size() <= 1)
            continue;
        rep(j, 1, vs[i].size()) {
            if(uni.unionSet(vs[i][0], vs[i][j])) {
                ans += i;
            }
        }
        if(uni.size(0) == b.size())
            break;
    }
    if(uni.size(0) != b.size()) {
        REP(i, b.size()) {
            auto d = divisor(b[i]);
            for(auto p : d) {
                if(vs[i].size())
                    if(uni.unionSet(i, vs[i][0]))
                        ans += gcd(vs[i][0], i);
            }

            if(uni.size(i) == 1 and i != 0) {
                uni.unionSet(i, 0);
                ans += gcd(b[i], b[0]);
            }
        }
    }
    assert(uni.size(0) == b.size());

    cout << ans << en;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    // cout << fixed << setprecision(10);

    // ll t;
    // cin >> t;
    // REP(i, t - 1) {
    //     solve();
    // }

    solve();

    return 0;
}