/*Bismillah*/
/*Subhan Allah Alhamdulillah Allahu Akber*/
#include<stdio.h>
int main()
{
    long int m,n,o,p,q,ans=0,j;
    scanf("%ld%ld%ld%ld%ld",&m,&n,&o,&p,&q);
    {

        for(j=1;j<=q;j++)
        {
            if((j%m==0)||(j%n==0)||(j%o==0)||(j%p==0))
            {


                ans++;
            }
        }
        printf("%ld\n",ans);
    }
}