weird number

noun

A natural number that is abundant but not semiperfect; one for which the sum of the proper divisors (including 1 but not itself) is greater than the number, but no subset of those divisors sums to the number itself.

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Meanings

nounweird number (plural weird numbers)

plural weird numbers

  1. mathematicsA natural number that is abundant but not semiperfect; one for which the sum of the proper divisors (including 1 but not itself) is greater than the number, but no subset of those divisors sums to the number itself.

Translations

Finnish outo luku
  • outo lukunatural number
Polish liczba dziwna
  • liczba dziwnanatural number
Cite this entry
APA

weird number. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/weird%20number

MLA

“weird number.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/weird%20number. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “weird number,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/weird%20number.

Source: weird number on Wiktionary, CC BY-SA 4.0.