13 кол-во ip-адресов (ipaddress)

from ipaddress import *
answ = 1000000000000
for mask in range(1, 21):
    net = ip_network('113.188.14.51/' + str(mask), 0)
    if ip_address('113.188.6.86') in net:
        cnt = 0
        for ip in net:
            if f'{ip:b}'.count('1') == 17:
                cnt += 1
        answ = min(answ, cnt)
print(answ)