Q: What is the sum of all factors of the number 280,415,065 including 280,415,065?

A: 399,375,360

Why is 399,375,360 the sum of all factors of 280,415,065, including 280,415,065?

The factors of the number 280,415,065 are: 1, 5, 7, 29, 35, 145, 203, 431, 641, 1015, 2155, 3017, 3205, 4487, 12499, 15085, 18589, 22435, 62495, 87493, 92945, 130123, 276271, 437465, 650615, 1381355, 1933897, 8011859, 9669485, 40059295, 56083013, 280415065.

If you add them up, you will get the total of 399,375,360.