using System;
using System.Collections.Generic;
using System.Linq;
using static System.Math;

namespace ConsoleApplication3
{
	public static class Extensions
	{
		public static IEnumerable<T> Do<T>(this IEnumerable<T> source, Action<T> process)
		{
			foreach (var elem in source)
			{
				process(elem);
				yield return elem;
			}
		}

		public static IEnumerable<T> Repeat<T>(this IEnumerable<T> source, Func<T, bool> condition, Action<T> sideEffect)
		{
			foreach (var i in source)
			{
				while (condition(i))
				{
					sideEffect(i);
					yield return i;
				}
			}
		}
	}


	class Program
	{
		private static readonly List<int> PrimeNumbers = new List<int> {2};

		public static IEnumerable<int> GetPrimeSequence() => PrimeNumbers.Concat(Enumerable.Range((PrimeNumbers.Max() - 1)/2 + 1, 1000000000)
			.Select(x => x*2 + 1)
			.Where(c => PrimeNumbers.TakeWhile(p => p <= Sqrt(c)).All(p => c%p != 0))
			.Do(x => PrimeNumbers.Add(x)));

		public static IEnumerable<int> Factorization(long value)
		{
			var tmp = value;
			return GetPrimeSequence().TakeWhile(_ => tmp != 1).Repeat(p => tmp%p == 0, p => tmp /= p);
		}


		public static long LeastCommonMultiple(params long[] values) => values.Select(
			v => Factorization(v).ToLookup(x => x).Select(x => new {prime = x.Key, value = (long) Pow(x.Key, x.Count())}))
			.SelectMany(x => x)
			.ToLookup(x => x.prime, x => x.value)
			.Select(x => x.Max())
			.Aggregate(1L, (a, d) => a*d);

		static void Main()
		{
			var n = long.Parse(Console.ReadLine());
			var values = Console.ReadLine().Split(' ').Select(x => long.Parse(x)).ToArray();

			var ab = LeastCommonMultiple(values[0], values[1]);
			var bc = LeastCommonMultiple(values[1], values[2]);
			var ca = LeastCommonMultiple(values[2], values[0]);
			var abc = LeastCommonMultiple(values);

			var ret = values.Select(x => n/x).Sum();
			ret -= n/ab;
			ret -= n/bc;
			ret -= n/ca;
			ret += n/abc;

			Console.WriteLine(ret);


		}
	}
}