n = int(input())
def divisor(n: int) -> list:
	r = []
	for i in range(1, int(n ** 0.5) + 1):
		if n % i != 0:
			continue
		r.append(i)
		if i * i != n:
			r.append(n // i)
	return sorted(r)
print(n - len(divisor(n)))