The factors of the number 2,502,528 are: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 19, 21, 24, 28, 32, 38, 42, 48, 49, 56, 57, 64, 76, 84, 96, 98, 112, 114, 128, 133, 147, 152, 168, 192, 196, 224, 228, 266, 294, 304, 336, 343, 384, 392, 399, 448, 456, 532, 588, 608, 672, 686, 784, 798, 896, 912, 931, 1029, 1064, 1176, 1216, 1344, 1372, 1568, 1596, 1824, 1862, 2058, 2128, 2352, 2432, 2688, 2744, 2793, 3136, 3192, 3648, 3724, 4116, 4256, 4704, 5488, 5586, 6272, 6384, 6517, 7296, 7448, 8232, 8512, 9408, 10976, 11172, 12768, 13034, 14896, 16464, 17024, 18816, 19551, 21952, 22344, 25536, 26068, 29792, 32928, 39102, 43904, 44688, 51072, 52136, 59584, 65856, 78204, 89376, 104272, 119168, 131712, 156408, 178752, 208544, 312816, 357504, 417088, 625632, 834176, 1251264, 2502528.
If you add them up, you will get the total of 8,160,000.