using System;
using System.Collections.Generic;

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 = long.Parse(inputArr[0]);
        var b = long.Parse(inputArr[1]);
        var c = long.Parse(inputArr[2]);
        var divSet = new HashSet<long>(new long[]{});
        
        AddDiv(divSet, a, n);
        AddDiv(divSet, b, n);
        AddDiv(divSet, c, n);
        
        Console.WriteLine(divSet.Count);
    }
}