1666
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
550 degrees.
The factors of 21 that add up to 8 are 1 and 7.
None. Factors don't add, they multiply.
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
167
-1005
268
factors of 30 that add to 17 are 2 and 15
47
1012