-503
-3
Well, 18 and 3 (both factors of 36) add up to 21. As well, the factors 12 and 9 add up to 21.
The factors of 36 are 1, 2, 3, 4, 6, 9, 12, 18, 36 No two of them add up to 23.
360
37
Well, honey, the positive odd factors of 36 are 1, 3, and 9. Add those bad boys up and you get 13. So, the sum of the positive odd factors of 36 is 13. Hope that satisfies your math cravings, sweetie!
39
The two square numbers that add up to 85 are 36 and 49. Specifically, 36 is (6^2) and 49 is (7^2). When you add them together, (36 + 49 = 85).
The two numbers that multiply to 36 and add up to 15 are 9 and 4. When you multiply 9 and 4, you get 36, and when you add them together, you get 15. Therefore, the answer is 9 and 4.
The factors of 21 that add up to 8 are 1 and 7.
They add up to 261
23/2 + (square root of 673) / 2, and 23/2 - (square root of 673) / 2.