using System;
using System.Collections.Generic;
using System.Linq;

public class CountDivisors{
    static void AddDiv(HashSet<long> h, long x, long n){
        for(long i = x; i <= n; i+=x){
            h.Add(i);
        }
    }
    public static void Main(){
        var n = long.Parse(Console.ReadLine());
        var input = Console.ReadLine();
        var inputArr = input.Split(' ');
        var a = inputArr.Select(s => long.Parse(s)).ToArray();
        Array.Sort(a);
        var divSet = new HashSet<long>(new long[]{});
        
        
        if(a[0] == 1){
            Console.WriteLine(n);
        }else{
            AddDiv(divSet, a[0], n);
            if(a[1]%a[0] != 0){
                AddDiv(divSet, a[1], n);
            }
            if(a[2]%a[1] != 0 && a[2]%a[0] != 0){
                AddDiv(divSet, a[2], n);
            }
            Console.WriteLine(divSet.Count);
        }
    }
}