Multiple choice general knowledge science & technology

Which is not a perfect number

  1. 8128

  2. 6

  3. 28

  4. 484
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

A perfect number equals the sum of its proper divisors. 6 = 1+2+3, 28 = 1+2+4+7+14, and 8128 are all perfect numbers. 484 = 2² × 11² is NOT perfect.

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