# -*- coding: utf-8 -*-
"""
No.316 もっと刺激的なFizzBuzzをください
https://yukicoder.me/problems/no/316

"""
import sys
from sys import stdin
from math import gcd
input = stdin.readline


def solve(N, numbers):
    ans = 0
    a, b, c, = numbers[0], numbers[1], numbers[2]

    ans += N // a
    ans += N // b
    ans += N // c

    ab = (a * b // gcd(a, b))
    bc = (b * c // gcd(b, c))
    ca = (c * a // gcd(c, a))
    ans -= N // ab
    ans -= N // bc
    ans -= N // ca

    ans += N // (ab * bc / gcd(ab, bc))
    ans += N // (bc * ca / gcd(bc, ca))
    ans -= N // (ab * ca / gcd(ab, ca))

    return int(ans)


def main(args):
    N = int(input())
    numbers = [int(x) for x in input().split()]
    ans = solve(N, numbers)
    print(ans)


if __name__ == '__main__':
    main(sys.argv[1:])