Q: What is the sum of all factors of the number 15,993,880 excluding 15,993,880?

A: 25,306,040

Why is 25,306,040 the sum of all factors of 15,993,880, excluding 15,993,880?

The factors of the number 15,993,880 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 40, 56, 70, 140, 239, 280, 478, 956, 1195, 1673, 1912, 2390, 3346, 4780, 6692, 8365, 9560, 13384, 16730, 33460, 57121, 66920, 114242, 228484, 285605, 399847, 456968, 571210, 799694, 1142420, 1599388, 1999235, 2284840, 3198776, 3998470, 7996940, 15993880.

If you add them up, you will get the total of 15,993,905. Now subtract 15,993,880 to get 25,306,040