Q: What is the sum of all factors of the number 720,130 excluding 720,130?

 A: 689,918

Why is 689,918 the sum of all factors of 720,130, excluding 720,130?

The factors of the number 720,130 are: 1, 2, 5, 10, 23, 31, 46, 62, 101, 115, 155, 202, 230, 310, 505, 713, 1010, 1426, 2323, 3131, 3565, 4646, 6262, 7130, 11615, 15655, 23230, 31310, 72013, 144026, 360065, 720130.

If you add them up, you will get the total of 720,819. Now subtract 720,130 to get 689,918


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