The factors of the number 21,888,360 are: 1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 13, 15, 18, 20, 24, 26, 27, 30, 36, 39, 40, 45, 52, 54, 60, 65, 72, 78, 90, 104, 108, 117, 120, 130, 135, 156, 180, 195, 216, 234, 260, 270, 312, 351, 360, 390, 468, 520, 540, 585, 702, 780, 936, 1080, 1170, 1404, 1559, 1560, 1755, 2340, 2808, 3118, 3510, 4677, 4680, 6236, 7020, 7795, 9354, 12472, 14031, 14040, 15590, 18708, 20267, 23385, 28062, 31180, 37416, 40534, 42093, 46770, 56124, 60801, 62360, 70155, 81068, 84186, 93540, 101335, 112248, 121602, 140310, 162136, 168372, 182403, 187080, 202670, 210465, 243204, 280620, 304005, 336744, 364806, 405340, 420930, 486408, 547209, 561240, 608010, 729612, 810680, 841860, 912015, 1094418, 1216020, 1459224, 1683720, 1824030, 2188836, 2432040, 2736045, 3648060, 4377672, 5472090, 7296120, 10944180, 21888360.
If you add them up, you will get the total of 78,624,000.