The first line of the input contains a single integer T denoting the number of test cases. The description of T test cases follows. Each test case contains a single integer N in a separate line.

The factoring methods are used to implement a fast sumOfDivisors() function. Another prominent subject in this library is prime generation and testing. For example, you can find a port of Kim ...

This prime factoring worksheet focuses on Clive, who is tackling his prime factors homework and knows that he’s made mistakes somewhere. Can pupils spot and correct the mistakes Clive has made? Can ...

There are many methods to find the prime factors of a number, but one of the most common is to use a prime factor tree. Firstly, find two numbers that will multiply together to give 40. These are ...

You have most likely heard the term factor before. A factor is a number that goes into another. The factors of 10 for example are 1, 2, 5 and 10. Prime numbers are a special set of numbers that only ...

Katie has a PhD in maths, specializing in the intersection of dynamical systems and number theory. She reports on topics from maths and history to society and animals. Katie has a PhD in maths, ...