题解 | #完全数计算#

def daidai(a):
    list1 = [1]
    for i in range(2,a):
        if a % i==0:
            list1.extend([i])
    return list1
n = int(input())
list2 = []
for i in range(2,n):
    miao = daidai(i)
    q = 0
    for j in range(len(miao)):
        q += miao[j]
    if q == i:
        list2.append(i)
print(len(list2))