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.
268
23
153
47
497
487
How about 47+47 = 94 as one example
The factors of 21 that add up to 8 are 1 and 7.
37
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.
It wasn't me, but I would have come up with 33. The four factors of 33 add up to 48.
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167