#include <math.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <assert.h>
#include <limits.h>
#include <stdbool.h>

int main() {
    int n,i,a[100],j,numerator,denominator,remainder,gcd,sum,max,max1,ans; 
    scanf("%i", &n);
    for (i=1;i<=n;i++)
    {
       scanf("%i",&a[i]);
    }
    for(i=1;i<=n;i++)
    {
        sum=0;
        max1=0;
        for(j=i;j<=n;j++)
        {
            max=0;
            if (a[i] > a[j])
            {
                numerator = a[i];
                denominator = a[j];
            }
            else
            {
                numerator = a[2];
                denominator = a[1];
            }
            remainder = numerator % denominator;
            while (remainder != 0)
            {
                numerator   = denominator;
                denominator = remainder;
                remainder   = numerator % denominator;
            }
            gcd = denominator;
            sum=sum+a[j];
            if(max<a[j])
                max=a[j];
        }
        ans=gcd*(sum-max);
        if(max1<ans)
            max1=ans;            
    }
    long int result = max1;
    printf("%ld\n", result);
    return 0;
}