#include<iostream>
#include<stdlib.h>
#include<math.h>
using namespace std;
int *sol ;

unsigned long long cal(unsigned long long x)
{
	if(sol[x]!=0)
	return sol[x];
	unsigned long long var=(unsigned long long)sqrt(x);
	int i,temp;
	for( i=2;i<=var;i++)
	{
		if(x%i==0)
		{
		
		temp = 1+i*(cal(x/i));
		if(temp>sol[x])
		sol[x]=temp;
		temp = 1+(x/i)*cal(i);
		if(temp>sol[x])
		sol[x]=temp;
	   }
	}
	
	if(sol[x]==0)
	{
		
		sol[x]=x+1;
	}
	return sol[x];
}
int main()
{
	int n;
	sol = (int*)calloc(sizeof(int),1000001);
	sol[0]=0;
    sol[1]=1;
	unsigned long long x,ans=0;
	scanf("%d",&n);
	for(int i=0;i<n;i++)
	{
		scanf("%d",&x);
		ans+=cal(x);
	}
	cout<<ans;
	return 0;
}