Q: What is the sum of all factors of the number 890,406 excluding 890,406?

Why is 1,269,594 the sum of all factors of 890,406, excluding 890,406?

The factors of the number 890,406 are: 1, 2, 3, 6, 9, 11, 18, 22, 27, 33, 54, 66, 99, 198, 297, 594, 1499, 2998, 4497, 8994, 13491, 16489, 26982, 32978, 40473, 49467, 80946, 98934, 148401, 296802, 445203, 890406.

If you add them up, you will get the total of 890,407. Now subtract 890,406 to get 1,269,594

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