6323
Chat with our AI personalities
The factors of 21 that add up to 8 are 1 and 7.
factors of 30 that add to 17 are 2 and 15
15 and 4 are the factors of 120 that add up to 19.
115
Add them up. The factors of 9 are 1, 3 and 9. The sum of the factors is 13.