#include <bits/stdc++.h>

using namespace std;

int n;
vector<long long int> v;
vector<pair<long long int, pair<long long int, long long int>>> vl;
vector<pair<long long int, pair<long long int, long long int>>> vr;
map<long long int, long long int> mp;
long long int ans;

long long int gcd(long long int a, long long int b){
    if(a > b){
        swap(a, b);
    }
    while(a){
        swap(a, b);
        a %= b;
    }
    return b;
}

long long int lcm(long long int a, long long int b){
    return a / gcd(a, b) * b;
}

inline void solve(int l, int r){
    int mid = (l + r) >> 1;
    {
        vl.clear();
        long long int sum = 0;
        long long int mx = v[mid];
        int gc = 0;
        for(int j = mid; j <= r; j++){
            sum += v[j];
            gc = gcd(gc, abs(v[j]) );
            mx = max(mx, v[j]);
            ans = max(ans, gc*(sum - mx));
        vl.push_back(make_pair(mx, make_pair(sum, gc)));
        }
    }
    {
        vr.clear();
        long long int sum = 0;
        long long int mx = v[mid];
        int gc = 0;
        for(int j = mid; j >=l; j--){
            sum += v[j];
            gc = gcd(gc, abs(v[j]) );
            mx = max(mx, v[j]);
            ans = max(ans, gc*(sum - mx));
        vr.push_back(make_pair(mx, make_pair(sum, gc)));
        }
    }
    sort(vl.begin(), vl.end());
    sort(vr.begin(), vr.end());
    int idx = 0;
    mp.clear();
    for(int i = 0; i < vl.size(); i++){
        while(idx < vr.size() && vr[idx].first <= vl[i].first){
            int gc = vr[idx].second.second;
            if(mp.count(gc) == 0){
                mp[gc] = LLONG_MIN;
            }
            mp[gc] = max(mp[gc], vr[idx].second.first-v[mid]);
            idx++;
        }
        for(auto it = mp.begin(); it != mp.end(); it++){
            long long int G = gcd((*it).first, vl[i].second.second);
            long long int SUM = (*it).second + vl[i].second.first;
            long long int MX = vl[i].first;
            G *= (SUM - MX);
            ans = max(ans, G);
        }
    }
    mp.clear();
    swap(vl, vr);
    idx = 0;
    for(int i = 0; i < vl.size(); i++){
        while(idx < vr.size() && vr[idx].first <= vl[i].first){
            int gc = vr[idx].second.second;
            if(mp.count(gc) == 0){
                mp[gc] = LLONG_MIN;
            }
            mp[gc] = max(mp[gc], vr[idx].second.first - v[mid]);
            idx++;
        }
        for(auto it = mp.begin(); it != mp.end(); it++){
            long long int G = gcd((*it).first, vl[i].second.second);
            long long int SUM = (*it).second + vl[i].second.first;
            long long int MX = vl[i].first;
            G *= (SUM - MX);
            ans = max(ans, G);
        }
    }
    if(l <= mid - 1) solve(l, mid - 1);
    if(mid + 1 <= r) solve(mid + 1, r);
}
int main(){
    cin >> n;
    for(int i = 0; i < n; i++){
        int a;
        scanf("%d", &a);
        v.push_back(a);
    }
    solve(0, n - 1);
    printf("%lld\n", ans);
    return 0;
}

#!/bin/python3

import math
import os
import random
import re
import sys

def gcd(x, y):
    x,y = abs(x),abs(y)
    while(y): 
        x, y = y, x % y 
    return x

def gcdAr(a):
    if len(a) == 2:
        return gcd(a[0],a[1])
    return gcd(a[0],gcdAr(a[1:]))
# Complete the maximumValue function below.
def maximumValue(a):
    l = len(a)
    
    mat = [[0]*l for i in range(l)]
    matSum = [[0]*l for i in range(l)]
    matMax = [[0]*l for i in range(l)]
    
    ma = -float('inf')
    
    for i in range(l):
        mat[i][i] = abs(a[i])
        matSum[i][i] = a[i]
        matMax[i][i] = a[i]

    for i in range(l):
        for j in range(i+1,l):
            mat[i][j] = gcd(a[j],mat[i][j-1])
            
    for i in range(l):
        for j in range(i+1,l):
            matSum[i][j] = matSum[i][j-1] + a[j]
    print(matSum)
    for i in range(l):
        for j in range(i+1,l):
            matMax[i][j] = max(matMax[i][j-1],a[j])
    print(matMax)
    for i in range(l):
        for j in range(i,l):
            f = mat[i][j]*(matSum[i][j] - matMax[i][j])
            if f > ma:
                ma = f
    return ma
            

if __name__ == '__main__':
    fptr = open(os.environ['OUTPUT_PATH'], 'w')

    n = int(input())

    a = list(map(int, input().rstrip().split()))

    result = maximumValue(a)

    fptr.write(str(result) + '\n')

    fptr.close()