You're probably looking for -49 and -18 which, although they do have a product of 882, are not considered factors of it. -49 and -18 are factors of -882.
67
The factors of 21 that add up to 8 are 1 and 7.
Here is a list.All Factors of 882:1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 147, 294, 441, 882
factors of 30 that add to 17 are 2 and 15
15 and 4 are the factors of 120 that add up to 19.
819
Just 1 and 67.
67
The factors of 21 that add up to 8 are 1 and 7.
Here is a list.All Factors of 882:1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 147, 294, 441, 882
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.
Factors multiply. The same set of numbers won't add up to both 140 and 240, but 120 and 20 are factors of 240 that total 140.
-1005
167
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
7 and 67.