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))