The factors of the number 8,689,824 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 13, 16, 18, 22, 24, 26, 32, 33, 36, 39, 44, 48, 52, 66, 72, 78, 88, 96, 99, 104, 117, 132, 143, 144, 156, 176, 198, 208, 211, 234, 264, 286, 288, 312, 352, 396, 416, 422, 429, 468, 528, 572, 624, 633, 792, 844, 858, 936, 1056, 1144, 1248, 1266, 1287, 1584, 1688, 1716, 1872, 1899, 2288, 2321, 2532, 2574, 2743, 3168, 3376, 3432, 3744, 3798, 4576, 4642, 5064, 5148, 5486, 6752, 6864, 6963, 7596, 8229, 9284, 10128, 10296, 10972, 13728, 13926, 15192, 16458, 18568, 20256, 20592, 20889, 21944, 24687, 27852, 30173, 30384, 32916, 37136, 41184, 41778, 43888, 49374, 55704, 60346, 60768, 65832, 74272, 83556, 87776, 90519, 98748, 111408, 120692, 131664, 167112, 181038, 197496, 222816, 241384, 263328, 271557, 334224, 362076, 394992, 482768, 543114, 668448, 724152, 789984, 965536, 1086228, 1448304, 2172456, 2896608, 4344912, 8689824.
If you add them up, you will get the total of 8,689,844. Now subtract 8,689,824 to get 20,479,680