The factors of the number 21,263,148 are: 1, 2, 3, 4, 6, 9, 12, 18, 27, 29, 31, 36, 54, 58, 62, 73, 81, 87, 93, 108, 116, 124, 146, 162, 174, 186, 219, 261, 279, 292, 324, 348, 372, 438, 522, 558, 657, 783, 837, 876, 899, 1044, 1116, 1314, 1566, 1674, 1798, 1971, 2117, 2263, 2349, 2511, 2628, 2697, 3132, 3348, 3596, 3942, 4234, 4526, 4698, 5022, 5394, 5913, 6351, 6789, 7884, 8091, 8468, 9052, 9396, 10044, 10788, 11826, 12702, 13578, 16182, 19053, 20367, 23652, 24273, 25404, 27156, 32364, 38106, 40734, 48546, 57159, 61101, 65627, 72819, 76212, 81468, 97092, 114318, 122202, 131254, 145638, 171477, 183303, 196881, 228636, 244404, 262508, 291276, 342954, 366606, 393762, 590643, 685908, 733212, 787524, 1181286, 1771929, 2362572, 3543858, 5315787, 7087716, 10631574, 21263148.
If you add them up, you will get the total of 60,170,880.