The factors of the number 870,912 are: 1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 27, 28, 32, 36, 42, 48, 54, 56, 63, 64, 72, 81, 84, 96, 108, 112, 126, 128, 144, 162, 168, 189, 192, 216, 224, 243, 252, 256, 288, 324, 336, 378, 384, 432, 448, 486, 504, 512, 567, 576, 648, 672, 756, 768, 864, 896, 972, 1008, 1134, 1152, 1296, 1344, 1512, 1536, 1701, 1728, 1792, 1944, 2016, 2268, 2304, 2592, 2688, 3024, 3402, 3456, 3584, 3888, 4032, 4536, 4608, 5184, 5376, 6048, 6804, 6912, 7776, 8064, 9072, 10368, 10752, 12096, 13608, 13824, 15552, 16128, 18144, 20736, 24192, 27216, 31104, 32256, 36288, 41472, 48384, 54432, 62208, 72576, 96768, 108864, 124416, 145152, 217728, 290304, 435456, 870912.
If you add them up, you will get the total of 870,914. Now subtract 870,912 to get 2,108,064