Why is 259 the sum of all factors of 144, excluding 144?
The factors of the number 144 are: 1, 2, 3, 4, 6, 8, 9, 12, 16, 18, 24, 36, 48, 72, 144.
If you add them up, you will get the total of 403. Now subtract 144 to get 259
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