print((function (f, n, a, b, c)
	function gcd(a,b) if b~=0 then return gcd(b,a%b) end return a end
	function lcm(a,b) return a/gcd(a,b)*b end
	return f(n/a)+f(n/b)+f(n/c)-f(n/lcm(a,b))-f(n/lcm(b,c))-f(n/lcm(c,a))+f(n/lcm(lcm(a,b),c))
end)(math.floor, io.stdin:read("*n"), io.stdin:read("*n"), io.stdin:read("*n"), io.stdin:read("*n")))