The factors of the number 21,142,836 are: 1, 2, 3, 4, 6, 9, 11, 12, 13, 18, 22, 26, 27, 33, 36, 37, 39, 44, 52, 54, 66, 74, 78, 99, 108, 111, 117, 132, 143, 148, 156, 198, 222, 234, 286, 297, 333, 351, 396, 407, 429, 444, 468, 481, 572, 594, 666, 702, 814, 858, 962, 999, 1188, 1221, 1287, 1332, 1369, 1404, 1443, 1628, 1716, 1924, 1998, 2442, 2574, 2738, 2886, 3663, 3861, 3996, 4107, 4329, 4884, 5148, 5291, 5476, 5772, 7326, 7722, 8214, 8658, 10582, 10989, 12321, 12987, 14652, 15059, 15444, 15873, 16428, 17316, 17797, 21164, 21978, 24642, 25974, 30118, 31746, 35594, 36963, 43956, 45177, 47619, 49284, 51948, 53391, 60236, 63492, 71188, 73926, 90354, 95238, 106782, 135531, 142857, 147852, 160173, 180708, 190476, 195767, 213564, 271062, 285714, 320346, 391534, 406593, 480519, 542124, 571428, 587301, 640692, 783068, 813186, 961038, 1174602, 1626372, 1761903, 1922076, 2349204, 3523806, 5285709, 7047612, 10571418, 21142836.
If you add them up, you will get the total of 66,185,280.