The factors of the number 15,540,672 are: 1, 2, 3, 4, 6, 7, 8, 12, 14, 16, 21, 24, 28, 31, 32, 42, 48, 56, 62, 64, 84, 93, 96, 112, 124, 168, 186, 192, 217, 224, 248, 336, 372, 373, 434, 448, 496, 651, 672, 744, 746, 868, 992, 1119, 1302, 1344, 1488, 1492, 1736, 1984, 2238, 2604, 2611, 2976, 2984, 3472, 4476, 5208, 5222, 5952, 5968, 6944, 7833, 8952, 10416, 10444, 11563, 11936, 13888, 15666, 17904, 20832, 20888, 23126, 23872, 31332, 34689, 35808, 41664, 41776, 46252, 62664, 69378, 71616, 80941, 83552, 92504, 125328, 138756, 161882, 167104, 185008, 242823, 250656, 277512, 323764, 370016, 485646, 501312, 555024, 647528, 740032, 971292, 1110048, 1295056, 1942584, 2220096, 2590112, 3885168, 5180224, 7770336, 15540672.
If you add them up, you will get the total of 48,637,952.