PERFECT NUMBER Definition & Meaning

perfect number

Mathematics.

a positive number that is equal to the sum of all positive integers that are submultiples of it, as 6, which is equal to the sum of 1, 2, and 3.

perfect number

an integer, such as 28, that is equal to the sum of all its possible factors, excluding itself

perfect number

A positive integer that equals the sum of all of its divisors other than itself. An example is 28, whose divisors (not counting itself) are 1, 2, 4, 7, and 14, which added together give 28.

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Middle English word dating back to 1350–1400

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Examples have not been reviewed.

“There is no perfect number to send, no perfect geography to send it out to,” Galperin said.

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"Without the scientific study, it can’t be said what will be the perfect number for Mount Everest," he said.

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Still, Pi is not a perfect number.

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“It’s one of those days, every shot you hit just has a perfect number,” An said.

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For me Bob Latchford was the perfect number nine, his buccaneering style was suited to that era in the '70s and early '80s.

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