1, 2, 3, 5, 6, 10, 13, 15, 26, 30, 39, 65, 78, 130, 195, 390.
They are: 21+6+2 = 29
There is an infinite amount of answers to that, such as: 301 + 89 = 390 3 + 387 = 390 150 + 240 = 390
The factors of 21 that add up to 8 are 1 and 7.
About 390 miles if you pick up Hwy 29 around Llano, TX.
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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