The factors of the number 421,551,144 are: 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 18, 21, 24, 28, 31, 36, 42, 56, 62, 63, 72, 84, 93, 124, 126, 168, 186, 217, 248, 252, 279, 372, 434, 504, 558, 651, 744, 868, 1116, 1302, 1736, 1953, 2232, 2604, 3906, 5208, 7812, 15624, 26981, 53962, 80943, 107924, 161886, 188867, 215848, 242829, 323772, 377734, 485658, 566601, 647544, 755468, 836411, 971316, 1133202, 1510936, 1672822, 1699803, 1942632, 2266404, 2509233, 3345644, 3399606, 4532808, 5018466, 5854877, 6691288, 6799212, 7527699, 10036932, 11709754, 13598424, 15055398, 17564631, 20073864, 23419508, 30110796, 35129262, 46839016, 52693893, 60221592, 70258524, 105387786, 140517048, 210775572, 421551144.
If you add them up, you will get the total of 1,346,941,440.