#include <iostream>
#include <unordered_map>
#include <vector>
#include <limits.h>
#include <algorithm>
#include <string>
#include <set>
#include <unordered_set>
#include <queue>
#include <deque>
#include <iomanip>
#include <cmath>
#include <numeric>
#include<cfloat>



using namespace std;

void solve() {
    long long target;
    cin >> target;
  long long a, b, c;
  cin  >> a >> b >>c;
  long long ans = ( target / a) + (target / b) + (target / c);
   long long  gcd = __gcd(a, b) * 1ll;
   long long  gcd2 = __gcd(a, c) * 1ll;
   long long  gcd3= __gcd(b, c) * 1ll;
   long long lcm1 = (a * b) / gcd * 1ll;
   long long lcm2 = (a * c) / gcd2 * 1ll;
   long long lcm3 = (b * c) / gcd3* 1ll;
   long long lcmCommon = (c * lcm1) / (__gcd(lcm1, c)) * 1ll;
   long long numCommon = target / lcmCommon;

   long long num1 = target / lcm1;
   long long num2 = target / lcm2;
   long long num3 = target / lcm3;

   ans -= num1;
   ans -= num2;
   ans -= num3;
   ans += numCommon;
   cout << ans << endl;





}
int main() {
    int t;
    // cin >> t;
    // while (t-- ) {
    //     solve();

    // }
     solve();

}