Q: What is the sum of all factors of the number 15,120,020 excluding 15,120,020?

A: 18,143,980

Why is 18,143,980 the sum of all factors of 15,120,020, excluding 15,120,020?

The factors of the number 15,120,020 are: 1, 2, 4, 5, 10, 20, 29, 58, 116, 131, 145, 199, 262, 290, 398, 524, 580, 655, 796, 995, 1310, 1990, 2620, 3799, 3980, 5771, 7598, 11542, 15196, 18995, 23084, 26069, 28855, 37990, 52138, 57710, 75980, 104276, 115420, 130345, 260690, 521380, 756001, 1512002, 3024004, 3780005, 7560010, 15120020.

If you add them up, you will get the total of 15,120,038. Now subtract 15,120,020 to get 18,143,980