The factors of the number 13,581,568 are: 1, 2, 4, 7, 8, 11, 13, 14, 16, 22, 26, 28, 32, 44, 52, 53, 56, 64, 77, 88, 91, 104, 106, 112, 128, 143, 154, 176, 182, 208, 212, 224, 256, 286, 308, 352, 364, 371, 416, 424, 448, 572, 583, 616, 689, 704, 728, 742, 832, 848, 896, 1001, 1144, 1166, 1232, 1378, 1408, 1456, 1484, 1664, 1696, 1792, 2002, 2288, 2332, 2464, 2756, 2816, 2912, 2968, 3328, 3392, 4004, 4081, 4576, 4664, 4823, 4928, 5512, 5824, 5936, 6784, 7579, 8008, 8162, 9152, 9328, 9646, 9856, 11024, 11648, 11872, 13568, 15158, 16016, 16324, 18304, 18656, 19292, 19712, 22048, 23296, 23744, 30316, 32032, 32648, 36608, 37312, 38584, 44096, 47488, 53053, 60632, 64064, 65296, 74624, 77168, 88192, 94976, 106106, 121264, 128128, 130592, 149248, 154336, 176384, 212212, 242528, 256256, 261184, 308672, 424424, 485056, 522368, 617344, 848848, 970112, 1044736, 1234688, 1697696, 1940224, 3395392, 6790784, 13581568.
If you add them up, you will get the total of 13,581,591. Now subtract 13,581,568 to get 23,504,768