Q: What is the sum of all factors of the number 87,040 excluding 87,040?

A: 134,036

Why is 134,036 the sum of all factors of 87,040, excluding 87,040?

The factors of the number 87,040 are: 1, 2, 4, 5, 8, 10, 16, 17, 20, 32, 34, 40, 64, 68, 80, 85, 128, 136, 160, 170, 256, 272, 320, 340, 512, 544, 640, 680, 1024, 1088, 1280, 1360, 2176, 2560, 2720, 4352, 5120, 5440, 8704, 10880, 17408, 21760, 43520, 87040.

If you add them up, you will get the total of 87,174. Now subtract 87,040 to get 134,036