find the sum of factors

Question

find the sum of all the factors of each numbers

1. 81

2. 102

Answer 1

81 = 3^4

81 has 4 prime factors of 3, summing to 4x3 =12

or maybe you want to sum all factors, without repetition: 1, 3, 9, 27, 81

to get 121

but 1 is not prime or composite, so just 120

102 = 3(17)(2) three prime factors sum to 22

or if you want to sum all prime & composite factors, 2, 3, 6, 34, 51, 102

= 198

or if you want to count 1, then sum=199