Q: What is the sum of all factors of the number 90,507,890 excluding 90,507,890?

Why is 88,426,510 the sum of all factors of 90,507,890, excluding 90,507,890?

The factors of the number 90,507,890 are: 1, 2, 5, 10, 11, 22, 55, 110, 151, 302, 755, 1510, 1661, 3322, 5449, 8305, 10898, 16610, 27245, 54490, 59939, 119878, 299695, 599390, 822799, 1645598, 4113995, 8227990, 9050789, 18101578, 45253945, 90507890.

If you add them up, you will get the total of 90,507,978. Now subtract 90,507,890 to get 88,426,510

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