Perfect Numbers

Number Theory Level 3

What is the sum of the first 3 perfect numbers?

Details and Assumptions:

  • A perfect number is a number whose factors other than itself add up to that number.

  • For example, 10 is not a perfect number because 1 + 2 + 5 = 8 ≠ 10 8 \neq 10 .


The answer is 530.

Amogha Pokkulandra by Amogha Pokkulandra , 23, USA

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1 solution

The first 3 perfect numbers are 6, 28, and 496. These numbers add up to 530 \boxed{530} .

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Is there any easy way to find those perfect numbers?

Peter van der Linden - 4 years ago

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Ow and 1+2+5 = 8, not 7 ;)

Peter van der Linden - 4 years ago

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