Q: What is the sum of all factors of the number 400,500 excluding 400,500?

A: 877,140

Why is 877,140 the sum of all factors of 400,500, excluding 400,500?

The factors of the number 400,500 are: 1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 18, 20, 25, 30, 36, 45, 50, 60, 75, 89, 90, 100, 125, 150, 178, 180, 225, 250, 267, 300, 356, 375, 445, 450, 500, 534, 750, 801, 890, 900, 1068, 1125, 1335, 1500, 1602, 1780, 2225, 2250, 2670, 3204, 4005, 4450, 4500, 5340, 6675, 8010, 8900, 11125, 13350, 16020, 20025, 22250, 26700, 33375, 40050, 44500, 66750, 80100, 100125, 133500, 200250, 400500.

If you add them up, you will get the total of 401,377. Now subtract 400,500 to get 877,140