uteta15p2 q97
0. Which of the following is a perfect number?
- Option : A
- Explanation : (A) In number theory, a perfect number is a positive integer that is equal to the sum of its proper positive divisors, that is the sum of its positive divisors excluding the number itself, so from the option, only 28 is the perfect number. i.e. 28 = 1 + 2 + 4 + 7 + 14
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