import sys, time, random
from collections import deque, Counter, defaultdict
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 63 - 1
mod = 998244353

n = ii()
S = set()
for i in range(1, n + 1):
    if i * i > n:
        break
    if n % i == 0:
        S.add(i)
        S.add(n // i)

print(n - len(S))