The factors of the number 423,526,644 are: 1, 2, 3, 4, 6, 9, 12, 17, 18, 19, 27, 34, 36, 38, 51, 54, 57, 68, 71, 76, 81, 102, 108, 114, 142, 153, 162, 171, 204, 213, 228, 243, 284, 306, 323, 324, 342, 361, 426, 459, 486, 513, 612, 639, 646, 684, 722, 852, 918, 969, 972, 1026, 1083, 1207, 1278, 1292, 1349, 1377, 1444, 1539, 1836, 1917, 1938, 2052, 2166, 2414, 2556, 2698, 2754, 2907, 3078, 3249, 3621, 3834, 3876, 4047, 4131, 4332, 4617, 4828, 5396, 5508, 5751, 5814, 6137, 6156, 6498, 7242, 7668, 8094, 8262, 8721, 9234, 9747, 10863, 11502, 11628, 12141, 12274, 12996, 14484, 16188, 16524, 17253, 17442, 18411, 18468, 19494, 21726, 22933, 23004, 24282, 24548, 25631, 26163, 29241, 32589, 34506, 34884, 36423, 36822, 38988, 43452, 45866, 48564, 51262, 52326, 55233, 58482, 65178, 68799, 69012, 72846, 73644, 76893, 78489, 87723, 91732, 97767, 102524, 104652, 109269, 110466, 116964, 130356, 137598, 145692, 153786, 156978, 165699, 175446, 195534, 206397, 218538, 220932, 230679, 275196, 293301, 307572, 313956, 327807, 331398, 350892, 391068, 412794, 435727, 437076, 461358, 497097, 586602, 619191, 655614, 662796, 692037, 825588, 871454, 922716, 994194, 1173204, 1238382, 1307181, 1311228, 1384074, 1491291, 1742908, 1857573, 1988388, 2076111, 2476764, 2614362, 2768148, 2982582, 3715146, 3921543, 4152222, 5228724, 5572719, 5965164, 6228333, 7430292, 7843086, 8304444, 11145438, 11764629, 12456666, 15686172, 22290876, 23529258, 24913332, 35293887, 47058516, 70587774, 105881661, 141175548, 211763322, 423526644.
If you add them up, you will get the total of 1,258,141,248.