The factors of the number 256,171,720 are: 1, 2, 4, 5, 7, 8, 10, 14, 20, 28, 35, 37, 40, 56, 70, 74, 79, 140, 148, 158, 185, 259, 280, 296, 313, 316, 370, 395, 518, 553, 626, 632, 740, 790, 1036, 1106, 1252, 1295, 1480, 1565, 1580, 2072, 2191, 2212, 2504, 2590, 2765, 2923, 3130, 3160, 4382, 4424, 5180, 5530, 5846, 6260, 8764, 10360, 10955, 11060, 11581, 11692, 12520, 14615, 17528, 20461, 21910, 22120, 23162, 23384, 24727, 29230, 40922, 43820, 46324, 49454, 57905, 58460, 81067, 81844, 87640, 92648, 98908, 102305, 115810, 116920, 123635, 162134, 163688, 173089, 197816, 204610, 231620, 247270, 324268, 346178, 405335, 409220, 463240, 494540, 648536, 692356, 810670, 818440, 865445, 914899, 989080, 1384712, 1621340, 1730890, 1829798, 3242680, 3461780, 3659596, 4574495, 6404293, 6923560, 7319192, 9148990, 12808586, 18297980, 25617172, 32021465, 36595960, 51234344, 64042930, 128085860, 256171720.
If you add them up, you will get the total of 256,172,151. Now subtract 256,171,720 to get 431,111,480