Try a factor tree. 99 33,3 11,3,3 3 x 3 x 11 = 99
156
1, 3, 9, 11, 33, 99 156
Well, honey, the common factors of 99 and 33 are 1, 3, and 11. Add those bad boys up and you get a grand total of 15. So, there you have it, the sum of all the common factors of 99 and 33 is 15.
297
Find factors of -99 which sum to -2. Solution appears to be 9 and -11 (x + 9)(x - 11)
A number whose proper factors add up to less than the number is called deficient. 99 is a deficient number because the sum of its proper factors (1, 3, 9, 11, and 33) is 57.
Exactly 99. Strange, isn't it?
The sum of 99 and 58,764,964,568 is 58,764,964,667.
The factors of 99 are 1, 3, 9, 11, 33 and 99.
The factors of 99 are: 1 3 9 11 33 99.
The sum of 88 and 11 is 99.