The factors of the number 7,221,456 are: 1, 2, 3, 4, 6, 8, 9, 11, 12, 16, 18, 22, 24, 33, 36, 44, 47, 48, 66, 72, 88, 94, 97, 99, 132, 141, 144, 176, 188, 194, 198, 264, 282, 291, 376, 388, 396, 423, 517, 528, 564, 582, 752, 776, 792, 846, 873, 1034, 1067, 1128, 1164, 1551, 1552, 1584, 1692, 1746, 2068, 2134, 2256, 2328, 3102, 3201, 3384, 3492, 4136, 4268, 4559, 4653, 4656, 6204, 6402, 6768, 6984, 8272, 8536, 9118, 9306, 9603, 12408, 12804, 13677, 13968, 17072, 18236, 18612, 19206, 24816, 25608, 27354, 36472, 37224, 38412, 41031, 50149, 51216, 54708, 72944, 74448, 76824, 82062, 100298, 109416, 150447, 153648, 164124, 200596, 218832, 300894, 328248, 401192, 451341, 601788, 656496, 802384, 902682, 1203576, 1805364, 2407152, 3610728, 7221456.
If you add them up, you will get the total of 7,221,471. Now subtract 7,221,456 to get 15,527,088