Factors of 28: 1, 2, 4, 7, 14, and 28 .
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The factors of 28 are: 1, 2, 4, 7, 14, 28.
The sum of all the positive factors of 12 is 28.
1, 2, 4, 7, 14, 28
No since it is an even number it has 2 as a factor. If the factors are the number itself and 1 it is prime. If there are more factors it is not. 28 has many more factors.28=22 x7So 2 and 4 and 7 are all factors as is 14.
A perfect number is a number that is the sum of all its proper factors (that is all its factors excluding itself). The next perfect number after 28 is 496