题解 | #完全数计算#

import sys

num = int(input())
count = 0


for i in range(1, num + 1):
    n = []
    for yinzi in range(1, i):
        if i % yinzi == 0:
            n.append(yinzi)
    total = 0
    for j in n:
        total += int(j)
    if total == i:
        count += 1
print(count)