The factors of the number 20,501,460 are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 53, 60, 63, 70, 84, 90, 105, 106, 126, 140, 159, 180, 210, 212, 252, 265, 307, 315, 318, 371, 420, 477, 530, 614, 630, 636, 742, 795, 921, 954, 1060, 1113, 1228, 1260, 1484, 1535, 1590, 1842, 1855, 1908, 2149, 2226, 2385, 2763, 3070, 3180, 3339, 3684, 3710, 4298, 4452, 4605, 4770, 5526, 5565, 6140, 6447, 6678, 7420, 8596, 9210, 9540, 10745, 11052, 11130, 12894, 13356, 13815, 16271, 16695, 18420, 19341, 21490, 22260, 25788, 27630, 32235, 32542, 33390, 38682, 42980, 48813, 55260, 64470, 65084, 66780, 77364, 81355, 96705, 97626, 113897, 128940, 146439, 162710, 193410, 195252, 227794, 244065, 292878, 325420, 341691, 386820, 455588, 488130, 569485, 585756, 683382, 732195, 976260, 1025073, 1138970, 1366764, 1464390, 1708455, 2050146, 2277940, 2928780, 3416910, 4100292, 5125365, 6833820, 10250730, 20501460.
If you add them up, you will get the total of 72,648,576.