Question

A number is called ___ if it is equal to the sum of all its factors.​

Answer 1

Answer:

perfect no.

Step-by-step explanation:

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Answer 2

Answer:

A number for which sum of all its factors is equal to twice the is called a perfect no ... For example, the divisors of 28 are 1, 2, 4, 7, 14, and 28, so the sum of proper divisors is 1 + 2 + 4 + 7 + 14 = 28