#include <cmath>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;

int main() {  
    int n;
    cin >> n;
  
    vector <long long> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
  
    /* Enter your code here. Print output to STDOUT */  
    long int mov[a.size()];
    int result=0;
    for(int j=0;j<a.size();j++){
        int max=a[j];
        int temp=a[j]-1;
        mov[j]=1;
        for(int i=1;i<max;i++){
            
            if(a[j]%temp==0){
                mov[j]=(a[j]/temp)*mov[j];
                a[j]=temp;
                temp--;
                result=result+mov[j];
                 }
            else
                 temp--;
                
        }
        
        
    }
   
    cout<<result<<endl;
 
    return 0;
}