Identify a perfect number from the following:

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8126

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496

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Solution

The correct options are
A 6
C 496
In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, i.e., the sum of its positive divisors excluding the number itself. Here, in the given options only 6 and 496 are perfect numbers.
6 = 1 + 2 + 3
496 = 1 + 2 + 4 + 8 + 16 + 31 + 62 + 124 + 248

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