a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3.
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How to use perfect number in a sentence
It’s natural to pursue the ideal testosterone levels or the perfect number of reps per set—we want to be our best.There are only two supplements proven to help you build muscle | empire | July 9, 2021 | Popular-Science
“There are never more than seven crackers on a plate—just seven, the perfect number,” sighed this hyperbolical girl.Nan Sherwood at Lakeview Hall | Annie Roe Carr
A perfect number (Greek), as already stated, is one which is equal to the sum of its divisors.The Republic | Plato
Seven was, among the Hebrews, their perfect number; and hence we see it continually recurring in all their sacred rites.The Symbolism of Freemasonry | Albert G. Mackey
I have gathered thousands of them in my rambles, and the same perfect number is found in every one.Heroines of the Crusades | C. A. Bloss
Six was a perfect number—that is, equal to the sum of all its factors—an additional reason why there must be exactly six planets.
British Dictionary definitions for perfect number
an integer, such as 28, that is equal to the sum of all its possible factors, excluding itself
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
Scientific definitions for perfect number
A positive integer that equals the sum of all of its divisors other than itself. An example is 28, whose divisors (not counting itself) are 1, 2, 4, 7, and 14, which added together give 28.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.