12610
31
Factors are multiplied, not added. The question needs to be something like, "Which two factors of thirty add up to 11?" The answer would then be 5 and 6.
Factors multiply, like 1 x 11. Addends add, like 5 and 6.
no 11 is not a perfect number because when u add the factors the don't add up to 11
35
6 + 3 + 2 7 + 3 + 1
1666
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
127
71
The factors of 21 that add up to 8 are 1 and 7.