6 is a perfect number. Which of the below is another perfect number?

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answer is A.

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Detailed Solution

A perfect number is defined as a positive number that equals the sum of its divisors.
Divisors of 6 = 1, 2, 3.
For 6, the sum of divisors is equal to 6.
For 28,
Divisors of 28 = 1, 2, 4, 7, 14, 28.
For 28, the sum of divisors is 28.
Therefore, the correct answer is option 1.

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