hyperperfect number

Fetched 2026-10-26 (cache).

Synonyms: superperfect number

Antonyms: superperfect number

Related words from Datamuse; suggestions, not definitions.

Noun

1. {{label|en|mathematics|number theory}} Any [[natural number]] ''n'' for which, for some positive integer ''k'', ''n'' = 1 + ''k''(σ(''n'') - ''n'' - 1), where σ(''n'') is the sum of the positive [[divisor]]s of ''n''.

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