Q: What is the sum of all factors of the number 138,375,780 excluding 138,375,780?

A: 251,345,244

Why is 251,345,244 the sum of all factors of 138,375,780, excluding 138,375,780?

The factors of the number 138,375,780 are: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 173, 346, 519, 692, 865, 1038, 1730, 2076, 2595, 3460, 5190, 10380, 13331, 26662, 39993, 53324, 66655, 79986, 133310, 159972, 199965, 266620, 399930, 799860, 2306263, 4612526, 6918789, 9225052, 11531315, 13837578, 23062630, 27675156, 34593945, 46125260, 69187890, 138375780.

If you add them up, you will get the total of 138,376,031. Now subtract 138,375,780 to get 251,345,244