#include<stdio.h>

int main()
{
	int n,i;
	unsigned long long int a,div,count=0;
	scanf("%d",&n);
	for(i=0;i<n;i++)
	{
		div = 2;
		scanf("%llu",&a);
		while(a!=1)
		{
			if(a%div==0)
			{
				count = count + a;
				a = a/div;
			}
			else
				div = div + 1;
			if(div>100000)
			{
				count = count + a;
				break;
			}
		}
	}
	printf("%llu\n",count+n);
}