#include<atcoder/all>
using namespace atcoder;

#include <bits/stdc++.h>
template<class T> inline bool chmin(T&a, T b){if(a > b){a = b; return true;}else{return false;}}
template<class T> inline bool chmax(T&a, T b){if(a < b){a = b; return true;}else{return false;}}
#define ll long long
#define double long double
#define rep(i,n) for(int i=0;i<(n);i++)
#define REP(i,n) for(int i=1;i<=(n);i++)
#define mod (ll)(1e9+7)
#define inf (ll)(3e18+7)
#define eps (double)(1e-9)
#define pi (double) acos(-1)
#define all(x) x.begin(),x.end()
#define rall(x) x.rbegin(),x.rend()
using namespace std;

struct smart_sieve{
	int n;
	vector<int> f;
	// 初期構築 : (nloglog(n))
	smart_sieve(int x = 1) :n(x), f(x+1, -1){
        for(ll i = 2; i <= n; i++){
            if(f[i] != -1)continue;
            for(ll j = i*i; j <= n; j += i){
                f[j] = (f[j] == -1 ? i : f[j]);
            }
            f[i] = i;
        }
	}
	// 素数判定 : O(1)
	bool isPrime(int x){return f[x] == x;}
	// 素因数分解 : O(log(n))
	vector<pair<ll,ll>> prime_factor(int x){
        if(x == 1)return {};
        vector<pair<ll, ll>> ret;
        ret.emplace_back(f[x], 1); x /= f[x];
		while(x != 1){
            if(f[x] == ret.back().first){
                ret.back().second++;
            }else{
                ret.emplace_back(f[x], 1);
            }
            x /= f[x];
        }
        return ret;
	}
};


int main(){
    int n;
    cin >> n;
    vector<int> a(n);
    rep(i, n)cin >> a[i];

    set<int> pf;
    smart_sieve ss(200000);
    rep(i, n){
        vector<pair<ll, ll>> p;
        p = ss.prime_factor(a[i]);
        for(auto x : p)pf.insert(x.first);
    }
    
    int cnt = 0, mn = mod;
    vector<int> pos(200000, -1);
    for(auto it = pf.begin(); it != pf.end(); it++){
        mn = (mn == mod ? (*it) : mn); pos[*it] = cnt++;
    }

    dsu uf(n+cnt);
    rep(i, n){
        vector<pair<ll, ll>> p;
        p = ss.prime_factor(a[i]);
        for(auto x : p)uf.merge(i, n+pos[x.first]);
    }

    set<int> st;
    rep(i, n)st.insert(uf.leader(i));
    int ans = mod, S = st.size();
    if(pos[2] == -1){
        ans = mn*(S-1);
    }else{
        ans = 2 * (S-1);
    }
	
    cout << ans << endl;
}