Q: What is the sum of all factors of the number 278,666,421 excluding 278,666,421?

A: 136,509,771

Why is 136,509,771 the sum of all factors of 278,666,421, excluding 278,666,421?

The factors of the number 278,666,421 are: 1, 3, 11, 33, 53, 159, 283, 563, 583, 849, 1689, 1749, 3113, 6193, 9339, 14999, 18579, 29839, 44997, 89517, 159329, 164989, 328229, 477987, 494967, 984687, 1752619, 5257857, 8444437, 25333311, 92888807, 278666421.

If you add them up, you will get the total of 278,666,557. Now subtract 278,666,421 to get 136,509,771