1 + 3 + 9 + 11 + 33 + 99 = 156
Try a factor tree. 99 33,3 11,3,3 3 x 3 x 11 = 99
156
1, 3, 9, 11, 33, 99 156
1, 3, 11 and 33
Find factors of -99 which sum to -2. Solution appears to be 9 and -11 (x + 9)(x - 11)
297
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 factors of 99 are 1, 3, 9, 11, 33 and 99.
The factors of 99 are: 1 3 9 11 33 99.
99 has six factors (1,99;3,33;9,11)
The sum of the factors of 10,752 is 32,736.