The factors of the number 7,757,568 are: 1, 2, 3, 4, 6, 7, 8, 9, 12, 13, 14, 16, 18, 21, 24, 26, 28, 32, 36, 37, 39, 42, 48, 52, 56, 63, 64, 72, 74, 78, 84, 91, 96, 104, 111, 112, 117, 126, 128, 144, 148, 156, 168, 182, 192, 208, 222, 224, 234, 252, 256, 259, 273, 288, 296, 312, 333, 336, 364, 384, 416, 444, 448, 468, 481, 504, 518, 546, 576, 592, 624, 666, 672, 728, 768, 777, 819, 832, 888, 896, 936, 962, 1008, 1036, 1092, 1152, 1184, 1248, 1332, 1344, 1443, 1456, 1554, 1638, 1664, 1776, 1792, 1872, 1924, 2016, 2072, 2184, 2304, 2331, 2368, 2496, 2664, 2688, 2886, 2912, 3108, 3276, 3328, 3367, 3552, 3744, 3848, 4032, 4144, 4329, 4368, 4662, 4736, 4992, 5328, 5376, 5772, 5824, 6216, 6552, 6734, 7104, 7488, 7696, 8064, 8288, 8658, 8736, 9324, 9472, 9984, 10101, 10656, 11544, 11648, 12432, 13104, 13468, 14208, 14976, 15392, 16128, 16576, 17316, 17472, 18648, 20202, 21312, 23088, 23296, 24864, 26208, 26936, 28416, 29952, 30303, 30784, 33152, 34632, 34944, 37296, 40404, 42624, 46176, 49728, 52416, 53872, 60606, 61568, 66304, 69264, 69888, 74592, 80808, 85248, 92352, 99456, 104832, 107744, 121212, 123136, 138528, 149184, 161616, 184704, 198912, 209664, 215488, 242424, 277056, 298368, 323232, 369408, 430976, 484848, 554112, 596736, 646464, 861952, 969696, 1108224, 1292928, 1939392, 2585856, 3878784, 7757568.
If you add them up, you will get the total of 7,757,588. Now subtract 7,757,568 to get 20,515,040