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Question 464: What is a perfect number?
Author: ShiplordAtvar - Category: Science
Difficulty: 5/5 - Zone: World

  • A number such that the sum of its factors, excluding itself, is greater than itself
  • A number such that its only divisors are 1 and itself
  • A number such that the sum of its factors, excluding itself, equals itself
  • A number such that it cannot be expressed as the ratio of two integers

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