268
243
Factors of 225 that add up to 18 = 1 + 3 + 5 + 9
Factors of 250 that add up to 18 = 1 + 2 + 5 + 10
23
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
527
6, 12 and 18
The factors of 8 are 1, 2, 4, and 8. The factors that add up to 10 are 2 and 8.
23
-10 & -18
360
91
5298
The two square numbers that add up to 225 are 144+81 = 225
The distinct prime factors of 550 are 2, 5 and 11. They add up to 18.
23
-273
27
46
Well, 18 and 3 (both factors of 36) add up to 21. As well, the factors 12 and 9 add up to 21.