Stack Exchange network consists of 176 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
An even number is perfect if, and only if, its cototient is equal to the square of the largest power of 2 contained in it.
We respect a laser-like focus on one topic.