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Challenges

Posts tagged number-theory

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Challenges Determine whether an integer is square-free

An integer is called square-free if it is not a multiple of a perfect square other than 1. For example, 42 is square-free, but 44 is not because it is a multiple of the perfect square 4 = 2². Your...

13 answers  ·  posted 1y ago by celtschk‭  ·  last activity 4mo ago by Shaggy‭

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Challenges Are they abundant, deficient or perfect?

Abundant numbers are numbers which are less than their proper divisor sum. For example $18$ is abundant as $1 + 2 + 3 + 6 + 9 = 21 &gt; 18$ Deficient numbers are numbers which are greater than the...

8 answers  ·  posted 1y ago by caird coinheringaahing‭  ·  last activity 1y ago by General Sebast1an‭

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