The factors of the number 803,880 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 24, 28, 29, 30, 33, 35, 36, 40, 42, 44, 45, 55, 56, 58, 60, 63, 66, 70, 72, 77, 84, 87, 88, 90, 99, 105, 110, 116, 120, 126, 132, 140, 145, 154, 165, 168, 174, 180, 198, 203, 210, 220, 231, 232, 252, 261, 264, 280, 290, 308, 315, 319, 330, 348, 360, 385, 396, 406, 420, 435, 440, 462, 495, 504, 522, 580, 609, 616, 630, 638, 660, 693, 696, 770, 792, 812, 840, 870, 924, 957, 990, 1015, 1044, 1155, 1160, 1218, 1260, 1276, 1305, 1320, 1386, 1540, 1595, 1624, 1740, 1827, 1848, 1914, 1980, 2030, 2088, 2233, 2310, 2436, 2520, 2552, 2610, 2772, 2871, 3045, 3080, 3190, 3465, 3480, 3654, 3828, 3960, 4060, 4466, 4620, 4785, 4872, 5220, 5544, 5742, 6090, 6380, 6699, 6930, 7308, 7656, 8120, 8932, 9135, 9240, 9570, 10440, 11165, 11484, 12180, 12760, 13398, 13860, 14355, 14616, 17864, 18270, 19140, 20097, 22330, 22968, 24360, 26796, 27720, 28710, 33495, 36540, 38280, 40194, 44660, 53592, 57420, 66990, 73080, 80388, 89320, 100485, 114840, 133980, 160776, 200970, 267960, 401940, 803880.
If you add them up, you will get the total of 3,369,600.