1 + 169 = 170
1 357 826 828
169 + 169 = 338
256 + 225 - 196 + 169 = 454
Assuming the series is 1 + 3 + 5 + ... + 25, the answer is 169.
They both add up to 169
The number is 16*10 plus 9*1 = 169
The factors of 169 are: 1, 13, 169
The factors of 169 are: 1, 13, 169.
169 times -1 = -169
1 x 169, 13 x 13, 169 x 1.
169 = 1 x 169, or 169 = 13 x 13
The factors of -169 are 1, -1, 13, -13, 169, -169 The prime factor is 13.