import java.io.*;
import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;

public class Solution {

   

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int[] a = new int[n];int sum=0;
        for(int a_i = 0; a_i < n; a_i++){
            a[a_i] = in.nextInt();
            
        }
     int arr[]=sort(a);   
       int t= findind(a,0,arr[arr.length-1]);
        int b= findind(a,0,arr[arr.length-2]);
         n=arr[t];int y=arr[b];
        //gcd
        int rem;
		while(n%y!=0)
		{
			rem=n%y;
			n=y;
			y=rem;
		}
		int gcd=y; 
        sum=arr[t]+arr[b];
        int max;
        if(arr[t]>arr[b])
            max=arr[t];
        else
            max=arr[b];
        int ans=gcd*(sum-max);//System.out.println(gcd);System.out.println(sum);System.out.println(max);
        System.out.println(ans);
        
    }
    public static int[] sort(int[] arr)
	{
		int i,j;
		for(i=0;i<arr.length-1;i++)
		{
			for(j=0;j<arr.length-i-1;j++)
			{
				if(arr[j]>arr[j+1])
				{
					int temp=arr[j];
					arr[j]=arr[j+1];
							arr[j+1]=temp;
				}
			}
		}
		return arr;
	}
    public static int findind(int[] arr, int vidx, int data) {

		if (vidx == arr.length)
			return -1;
		if (arr[vidx] == data)
			return vidx;
		int rv = findind(arr, vidx + 1, data);
		return rv;

	}

}