#include <cstdio>
#include <cstdlib>
#include <cmath>
#include <cstring>
#include <string>
#include <algorithm>
#include <iostream>
#define clr(a,b) memset(a,b,sizeof(a))
#define ll long long

using namespace std;

const int maxn=1e5+10;
int n;
int a[maxn];
		
int main()
{
	scanf("%d",&n);
	for(int i=0;i<n;i++)scanf("%d",&a[i]);
	sort(a,a+n);
	for(int i=n-2;i>=0;i--)
	{
		if(a[n-1]%a[i])
		{
			a[n-1]+=a[i];
			break;
		}
	}
	printf("%d\n",a[n-1]);
}