Perfect number
id:
perfect-number-204-17673926
title:
Perfect number
text:
In number theory, a perfect number is a positive integer that is equal to the sum of its positive proper divisors, that is, divisors excluding the number itself. For instance, 6 has proper divisors 1, 2 and 3, and 1 + 2 + 3 = 6, so 6 is a perfect number. The next perfect number is 28, since 1 + 2 + 4 + 7 + 14 = 28. The first four perfect numbers are 6, 28, 496 and 8128. The sum of proper divisors of a number is called its aliquot sum, so a perfect number is one that is equal to its aliquot sum.
brand slug:
wiki
category slug:
encyclopedia
description:
Integer equal to the sum of its proper divisors
original url:
https://en.wikipedia.org/wiki/Perfect_number
date created:
2001-08-07T18:39:26Z
date modified:
2024-09-10T02:19:43Z
main entity:
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image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/d/db/Perfect_number_Cuisenaire_rods_6_exact.svg","width":437,"height":345}
fields total:
13
integrity:
16