The factors of the number 4,398,576 are: 1, 2, 3, 4, 6, 7, 8, 12, 13, 14, 16, 19, 21, 24, 26, 28, 38, 39, 42, 48, 52, 53, 56, 57, 76, 78, 84, 91, 104, 106, 112, 114, 133, 152, 156, 159, 168, 182, 208, 212, 228, 247, 266, 273, 304, 312, 318, 336, 364, 371, 399, 424, 456, 494, 532, 546, 624, 636, 689, 728, 741, 742, 798, 848, 912, 988, 1007, 1064, 1092, 1113, 1272, 1378, 1456, 1482, 1484, 1596, 1729, 1976, 2014, 2067, 2128, 2184, 2226, 2544, 2756, 2964, 2968, 3021, 3192, 3458, 3952, 4028, 4134, 4368, 4452, 4823, 5187, 5512, 5928, 5936, 6042, 6384, 6916, 7049, 8056, 8268, 8904, 9646, 10374, 11024, 11856, 12084, 13091, 13832, 14098, 14469, 16112, 16536, 17808, 19292, 20748, 21147, 24168, 26182, 27664, 28196, 28938, 33072, 38584, 39273, 41496, 42294, 48336, 52364, 56392, 57876, 77168, 78546, 82992, 84588, 91637, 104728, 112784, 115752, 157092, 169176, 183274, 209456, 231504, 274911, 314184, 338352, 366548, 549822, 628368, 733096, 1099644, 1466192, 2199288, 4398576.
If you add them up, you will get the total of 14,999,040.