Q: What is the sum of all factors of the number 136,689 excluding 136,689?

 A: 81,423

Why is 81,423 the sum of all factors of 136,689, excluding 136,689?

The factors of the number 136,689 are: 1, 3, 7, 21, 23, 69, 161, 283, 483, 849, 1981, 5943, 6509, 19527, 45563, 136689.

If you add them up, you will get the total of 136,770. Now subtract 136,689 to get 81,423


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