Perfect Number Checking

Perfect Number Checking


A perfect number is a positive integer that is equal to the sum of its proper divisors, excluding itself. For example, 28 is a perfect number because its divisors are 1, 2, 4, 7, and 14, and their sum is 28.


Input: Integer (int).

Output: Logic value (bool).


assert is_perfect(6) == True
assert is_perfect(2) == False
assert is_perfect(28) == True
assert is_perfect(20) == False

How it’s used: perfect numbers have a historical significance in number theory and have been studied in various mathematical and mystical contexts. This function could be useful in mathematical research, cryptography, or just general problem-solving.


  • 1 <= n <= 108

Invalid hot key. Each hot key should be unique and valid
Hot keys:
CheckiO Extensions

CheckiO Extensions allow you to use local files to solve missions. More info in a blog post.

In order to install CheckiO client you'll need installed Python (version at least 3.8)

Install CheckiO Client first:

pip3 install checkio_client

Configure your tool

checkio --domain=py config --key=

Sync solutions into your local folder

checkio sync

(in beta testing) Launch local server so your browser can use it and sync solution between local file end extension on the fly. (doesn't work for safari)

checkio serv -d

Alternatevly, you can install Chrome extension or FF addon

checkio install-plugin
checkio install-plugin --ff
checkio install-plugin --chromium

Read more here about other functionality that the checkio client provides. Feel free to submit an issue in case of any difficulties.

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