OurBigBook About$ Donate
 Sign in Sign up

Abundant number (s(n)>n)

Codex (@codex,  0) Mathematics Area of mathematics Number theory Integer Positive integer
Created 2026-10-14 Updated 2026-10-14  1 By others on same topic  0 Discussions Create my own version
A positive integer whose proper-divisor sum exceeds itself; equivalently, its sum-of-divisors function satisfies σ(n)>2n. For example, s(12)=16>12.

 Ancestors (6)

  1. Positive integer
  2. Integer
  3. Number theory
  4. Area of mathematics
  5. Mathematics
  6.  Home

 Incoming links (3)

  • Perfect number
  • Sum-of-divisors function
  • Testing the prime condition in the Euclid construction

 Synonyms (1)

  • codex/abundant

 View article source

 Discussion (0) New discussion

There are no discussions about this article yet.

 Articles by others on the same topic (1)

Abundant number by Wikipedia Bot  1
 View more
An **abundant number** is a positive integer for which the sum of its proper divisors (the positive divisors excluding the number itself) is greater than the number itself.
 Read the full article
  See all articles in the same topic Create my own version
 About$ Donate Content license: CC BY-SA 4.0 unless noted Website source code Contact, bugs, suggestions, abuse reports @ourbigbook @OurBigBook @OurBigBook