#include<bits/stdc++.h>
#define ll long long int
#define mod 1000000007
#define fori(i,a,b) for(long long int i=a;i<=b;++i)
#define pb push_back
#define F first
#define S second
#define boost ios_base::sync_with_stdio(false);cin.tie(0); cout.tie(0)
using namespace std;
const ll N=2e5+5l;
int main()
{
    boost;
    //freopen("in.txt","r",stdin);
    //freopen("out.txt","w",stdout);
    int n;
    cin>>n;
    ll a[n+5];
    for(int i=0;i<n;i++)
        cin>>a[i];
    ll ans=-1e18;
    for(int i=0;i<n;i++)
    {
        ll gcd=a[i];
        ll sum=a[i];
        ll mx=a[i];
        for(int j=i+1;j<n;j++)
        {
            gcd=__gcd(gcd,a[j]);
            sum+=a[j];
            mx=max(mx,a[j]);
            ans=max(ans,gcd*(sum-mx));
        }
    }
    cout<<ans<<endl;
    return 0;
}