Usually means: Number not equal to divisors' sum.
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We found 5 dictionaries that define the word imperfect number:

General (5 matching dictionaries)
  1. imperfect number: Merriam-Webster
  2. imperfect number: Wordnik
  3. Imperfect number: Dictionary.com
  4. imperfect number: FreeDictionary.org
  5. Imperfect number: TheFreeDictionary.com



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