The factors of the number 989,520 are: 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 19, 20, 21, 24, 28, 30, 31, 35, 38, 40, 42, 48, 56, 57, 60, 62, 70, 76, 80, 84, 93, 95, 105, 112, 114, 120, 124, 133, 140, 152, 155, 168, 186, 190, 210, 217, 228, 240, 248, 266, 280, 285, 304, 310, 336, 372, 380, 399, 420, 434, 456, 465, 496, 532, 560, 570, 589, 620, 651, 665, 744, 760, 798, 840, 868, 912, 930, 1064, 1085, 1140, 1178, 1240, 1302, 1330, 1488, 1520, 1596, 1680, 1736, 1767, 1860, 1995, 2128, 2170, 2280, 2356, 2480, 2604, 2660, 2945, 3192, 3255, 3472, 3534, 3720, 3990, 4123, 4340, 4560, 4712, 5208, 5320, 5890, 6384, 6510, 7068, 7440, 7980, 8246, 8680, 8835, 9424, 10416, 10640, 11780, 12369, 13020, 14136, 15960, 16492, 17360, 17670, 20615, 23560, 24738, 26040, 28272, 31920, 32984, 35340, 41230, 47120, 49476, 52080, 61845, 65968, 70680, 82460, 98952, 123690, 141360, 164920, 197904, 247380, 329840, 494760, 989520.
If you add them up, you will get the total of 3,809,280.