The factors of the number 12,528,516 are: 1, 2, 3, 4, 6, 7, 11, 12, 13, 14, 21, 22, 26, 28, 33, 39, 42, 44, 49, 52, 66, 77, 78, 84, 91, 98, 132, 143, 147, 149, 154, 156, 182, 196, 231, 273, 286, 294, 298, 308, 364, 429, 447, 462, 539, 546, 572, 588, 596, 637, 858, 894, 924, 1001, 1043, 1078, 1092, 1274, 1617, 1639, 1716, 1788, 1911, 1937, 2002, 2086, 2156, 2548, 3003, 3129, 3234, 3278, 3822, 3874, 4004, 4172, 4917, 5811, 6006, 6258, 6468, 6556, 7007, 7301, 7644, 7748, 9834, 11473, 11622, 12012, 12516, 13559, 14014, 14602, 19668, 21021, 21307, 21903, 22946, 23244, 27118, 28028, 29204, 34419, 40677, 42042, 42614, 43806, 45892, 54236, 63921, 68838, 80311, 81354, 84084, 85228, 87612, 94913, 127842, 137676, 149149, 160622, 162708, 189826, 240933, 255684, 284739, 298298, 321244, 379652, 447447, 481866, 569478, 596596, 894894, 963732, 1044043, 1138956, 1789788, 2088086, 3132129, 4176172, 6264258, 12528516.
If you add them up, you will get the total of 40,219,200.