Two factors of what?
To sum to -2, some possibilities are:
-1, -1 => what is 1
0, -2 => what is 0
1, -3 => what is -3
2, -4 => what is -8
3, -5 => what is -15
4, -6 => what is -24
1 plus 1
The sum of the factors of 2^16 - 1 = 65535 is 299.
10 and 2
14 and 2
4 and 2 are factors of -28.
7 and 9
7 and 9
24 and 16 are factors of 48
2 and 3
5 and 2
The two factors are [1 - sqrt(57)] / 2 and [1 + sqrt(57)] / 2 2 and -1 are factors of -14.
That depends on where you start and in what direction you proceed. If you list the prime factors in the order from smallest to largest, then the first two are 2 and 3, and their sum is 5.
63.