/*
######  ######    #####  ######  ######  #####
 #   #  #    #      #    #    #  #    #    #
 #   #  # #  #      #    # ## #  # ## #    #
 #   #  #  #    #   #    #    #  #    #    #
######  #   #   # # #    #    #  #    #    #
 */
import java.util.*;
import java.io.*;
class strangeFunc {
    public static void main(String args[] ) throws Exception {
        //FastReader scan=new FastReader();
        Scanner scan = new Scanner(System.in);
        PrintStream p = System.out;
        //p.println();
        boolean b1 = false,b2=false;    
        int n =scan.nextInt();
        int []arr = new int[n+1];
        for(int i=1;i<=n;i++){
            arr[i] = scan.nextInt();
        }
        int max1 =0;
        for(int i=1;i<=n;i++){
            for(int j=1;j<=n;j++){
                int gcd = findGCD(arr,i,j);
                int sum = sum(arr,i,j);
                int max = max(arr,i,j);
                int func = gcd*(sum-max);
                //func = func;
                //p.println(i+" "+j+" "+func);
                if(max1<func){
                    max1 = func;
                }
            }
        }
        p.println(max1);
    }
    static int gcd(int a, int b){
        if (a == 0)
            return b;
        return gcd(b%a, a);
    }
    static int findGCD(int arr[], int a,int b){
        int result = arr[0];
        for (int i=a; i<=b; i++)
            result = gcd(arr[i], result);
         
        return result;
    }
    static int sum(int arr[], int a,int b){
        int sum = 0;
        for(int i=a;i<=b;i++) sum += arr[i];
        return sum;
    }
    static int max(int arr[], int a,int b){
        int max = 0;

        for(int i=a;i<=b;i++){
            if(arr[i]>max){
                max = arr[i];
            }
        }
        return max;
    }
    static class FastReader{
        BufferedReader br;
        StringTokenizer st;
 
        public FastReader(){
            br = new BufferedReader(new
                     InputStreamReader(System.in));
        }
 
        String next(){
            while (st == null || !st.hasMoreElements()){
                try{
                    st = new StringTokenizer(br.readLine());
                }
                catch (IOException  e){
                    e.printStackTrace();
                }
            }
            return st.nextToken();
        }
 
        int nextInt(){
            return Integer.parseInt(next());
        }
 
        long nextLong(){
            return Long.parseLong(next());
        }
 
        double nextDouble(){
            return Double.parseDouble(next());
        }
 
        String nextLine(){
            String str = "";
            try{
                str = br.readLine();
            }
            catch (IOException e){
                e.printStackTrace();
            }
            return str;
        }
    }
}