Thinking Mathematically (6th Edition)

Published by Pearson
ISBN 10: 0321867327
ISBN 13: 978-0-32186-732-2

Chapter 5 - Number Theory and the Real Number System - 5.1 Number Theory: Prime and Composite Numbers - Exercise Set 5.1: 76

Answer

6 is a perfect number.

Work Step by Step

Excluding 6, the factors of 6 are: $1, 2, \text{ and } 3$ The sum of the factors is: $=3+2+1 \\=6$ The sum of the factors is equal to the number itself, so the number is a perfect number.
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