1, 2, 4, 7, 8, 14, 28, 56
1, 5, 17, 85
1, 2, 43, 86
1, 89
1, 2, 3, 5, 6, 9, 10, 15, 18, 30, 45, 90
28 is a perfect number. Add the factors of the number, excluding the number itself. 28: 1 +2 +4 + 7 + 14 = 28. The sum of its factors is the same as the number! The next perfect numbers are 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176, and 191561942608236107294793378084303638130997321548169216. Chances are that you won't be using that!
Factors of 90 will be factors of 180.
factors: 1, 449prime factors: 449
Yes, all the factors of 12 are factors of 24.
Factors: 1,166,2,83 Prime factors: 2, 83
There are 32 factors. These are 2n and 131071*2n for n = 0 to 15, and
It is the sum of all its factors (other than itself).
496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128
28 is a perfect number. Add the factors of the number, excluding the number itself. 28: 1 +2 +4 + 7 + 14 = 28. The sum of its factors is the same as the number! The next perfect numbers are 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176, and 191561942608236107294793378084303638130997321548169216. Chances are that you won't be using that!
Yes, as has been known since 1588 For a list of all known perfect numbers see the related link.
No it is not. Here is a lits of some of the first perfect numbers6, 28, 496, 8128, 33550336, 8589869056, 137438691328, 2305843008139952128, 2658455991569831744654692615953842176, 191561942608236107294793378084303638130997321548169216
Here are the first few: 6 28 496 8128 33550336 8589869056 137438691328 2305843008139952128 2658455991569831744654692615953842176 191561942608236107294793378084303638130997321548169216 I don't know if more of them are known. For more information see oeis.org.
Factors of 1451529145Prime factors of 145529
Factors of 90 will be factors of 180.
Prime factors are factors that are also prime numbers.
Factors: 1,3,5,15 Prime Factors: 3,5
the factors are 1,2,3,4,6,8,12,24 and it has 8 factors