The factors of the number 20,091,720 are: 1, 2, 3, 4, 5, 6, 8, 10, 11, 12, 15, 20, 22, 24, 30, 31, 33, 40, 44, 55, 60, 62, 66, 88, 93, 110, 120, 124, 132, 155, 165, 186, 220, 248, 264, 310, 330, 341, 372, 440, 465, 491, 620, 660, 682, 744, 930, 982, 1023, 1240, 1320, 1364, 1473, 1705, 1860, 1964, 2046, 2455, 2728, 2946, 3410, 3720, 3928, 4092, 4910, 5115, 5401, 5892, 6820, 7365, 8184, 9820, 10230, 10802, 11784, 13640, 14730, 15221, 16203, 19640, 20460, 21604, 27005, 29460, 30442, 32406, 40920, 43208, 45663, 54010, 58920, 60884, 64812, 76105, 81015, 91326, 108020, 121768, 129624, 152210, 162030, 167431, 182652, 216040, 228315, 304420, 324060, 334862, 365304, 456630, 502293, 608840, 648120, 669724, 837155, 913260, 1004586, 1339448, 1674310, 1826520, 2009172, 2511465, 3348620, 4018344, 5022930, 6697240, 10045860, 20091720.
If you add them up, you will get the total of 68,014,080.