Q: What is the sum of all factors of the number 1,249,840 excluding 1,249,840?

A: 1,830,320

Why is 1,830,320 the sum of all factors of 1,249,840, excluding 1,249,840?

The factors of the number 1,249,840 are: 1, 2, 4, 5, 8, 10, 16, 17, 20, 34, 40, 68, 80, 85, 136, 170, 272, 340, 680, 919, 1360, 1838, 3676, 4595, 7352, 9190, 14704, 15623, 18380, 31246, 36760, 62492, 73520, 78115, 124984, 156230, 249968, 312460, 624920, 1249840.

If you add them up, you will get the total of 1,249,841. Now subtract 1,249,840 to get 1,830,320