#define MAXN 100005

 using namespace std;

 int visited[MAXN]; // index from 1

 void attack(int c, int d)

 {

     int f = d/c;

     for(int i = ; i <= f; i++)

         visited[c*i] = true;

 }

 int main()

 {

     int k, l, m, n, d, sum;

     while(~scanf("%d%d%d%d%d", &k, &l, &m, &n, &d))

     {

         // init

         sum = ;

         memset(visited, , sizeof(int)*MAXN);

         // attack

         attack(k, d);

         attack(l, d);

         attack(m, d);

         attack(n, d);

         // count attacked dragon

         for(int i = ; i <= d; i++)

             if(visited[i] == )

                 sum++;

         printf("%d\n", sum);

     }

     return ;

 }