#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;
int main() {  
int n,i,v,s=0;
cin >> n;
vector <long long> a(n);
for (int i = 0; i < n; i++)
{
cin >> a[i];
}
for(i=0;i<n;i++)
{
v=a[i];
while(v>0)
{
if(a[i]%v==0)
{
s+=v;
}
v=v/2;
}
}
cout<<s;
return 0;
}