The factors of the number 1,254,528 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 27, 32, 33, 36, 44, 48, 54, 64, 66, 72, 81, 88, 96, 99, 108, 121, 128, 132, 144, 162, 176, 192, 198, 216, 242, 264, 288, 297, 324, 352, 363, 384, 396, 432, 484, 528, 576, 594, 648, 704, 726, 792, 864, 891, 968, 1056, 1089, 1152, 1188, 1296, 1408, 1452, 1584, 1728, 1782, 1936, 2112, 2178, 2376, 2592, 2904, 3168, 3267, 3456, 3564, 3872, 4224, 4356, 4752, 5184, 5808, 6336, 6534, 7128, 7744, 8712, 9504, 9801, 10368, 11616, 12672, 13068, 14256, 15488, 17424, 19008, 19602, 23232, 26136, 28512, 34848, 38016, 39204, 46464, 52272, 57024, 69696, 78408, 104544, 114048, 139392, 156816, 209088, 313632, 418176, 627264, 1254528.
If you add them up, you will get the total of 4,103,715.