Q: What is the sum of all factors of the number 655,173,729 excluding 655,173,729?

A: 442,362,399

Why is 442,362,399 the sum of all factors of 655,173,729, excluding 655,173,729?

The factors of the number 655,173,729 are: 1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 2063, 4473, 5041, 6189, 14441, 15123, 18567, 35287, 43323, 45369, 105861, 129969, 146473, 317583, 439419, 1025311, 1318257, 3075933, 9227799, 10399583, 31198749, 72797081, 93596247, 218391243, 655173729.

If you add them up, you will get the total of 655,174,171. Now subtract 655,173,729 to get 442,362,399