The factors of the number 3,281,040 are: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 16, 18, 20, 21, 24, 27, 28, 30, 31, 35, 36, 40, 42, 45, 48, 49, 54, 56, 60, 62, 63, 70, 72, 80, 84, 90, 93, 98, 105, 108, 112, 120, 124, 126, 135, 140, 144, 147, 155, 168, 180, 186, 189, 196, 210, 216, 217, 240, 245, 248, 252, 270, 279, 280, 294, 310, 315, 336, 360, 372, 378, 392, 420, 432, 434, 441, 465, 490, 496, 504, 540, 558, 560, 588, 620, 630, 651, 720, 735, 744, 756, 784, 837, 840, 868, 882, 930, 945, 980, 1008, 1080, 1085, 1116, 1176, 1240, 1260, 1302, 1323, 1395, 1470, 1488, 1512, 1519, 1674, 1680, 1736, 1764, 1860, 1890, 1953, 1960, 2160, 2170, 2205, 2232, 2352, 2480, 2520, 2604, 2646, 2790, 2940, 3024, 3038, 3255, 3348, 3472, 3528, 3720, 3780, 3906, 3920, 4185, 4340, 4410, 4464, 4557, 5040, 5208, 5292, 5580, 5859, 5880, 6076, 6510, 6615, 6696, 7056, 7440, 7560, 7595, 7812, 8370, 8680, 8820, 9114, 9765, 10416, 10584, 11160, 11718, 11760, 12152, 13020, 13230, 13392, 13671, 15120, 15190, 15624, 16740, 17360, 17640, 18228, 19530, 21168, 22320, 22785, 23436, 24304, 26040, 26460, 27342, 29295, 30380, 31248, 33480, 35280, 36456, 39060, 41013, 45570, 46872, 52080, 52920, 54684, 58590, 60760, 66960, 68355, 72912, 78120, 82026, 91140, 93744, 105840, 109368, 117180, 121520, 136710, 156240, 164052, 182280, 205065, 218736, 234360, 273420, 328104, 364560, 410130, 468720, 546840, 656208, 820260, 1093680, 1640520, 3281040.
If you add them up, you will get the total of 13,570,560.