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perf.
perfect
perfect binding
perfect capital market
perfect competition
perfect game
perfect gas
perfect hedge
perfect number
perfect participle
perfect pitch
perfect rhyme
perfect square
perfect title
perfecta
perfected first lien
perfection
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perfect number

per·fect num·ber (plural per·fect num·bers)


noun 
Definition:
 
kind of whole number: a positive whole number that is equal to the sum of the numbers that can be multiplied to give it as a result, excluding itself

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