The factors of the number 20,601,504 are: 1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 14, 16, 18, 21, 22, 24, 28, 32, 33, 36, 42, 44, 48, 56, 63, 66, 72, 77, 84, 88, 96, 99, 112, 126, 132, 144, 154, 168, 176, 198, 224, 231, 252, 264, 288, 308, 336, 352, 396, 462, 504, 528, 616, 672, 693, 792, 924, 929, 1008, 1056, 1232, 1386, 1584, 1848, 1858, 2016, 2464, 2772, 2787, 3168, 3696, 3716, 5544, 5574, 6503, 7392, 7432, 8361, 10219, 11088, 11148, 13006, 14864, 16722, 19509, 20438, 22176, 22296, 26012, 29728, 30657, 33444, 39018, 40876, 44592, 52024, 58527, 61314, 66888, 71533, 78036, 81752, 89184, 91971, 104048, 117054, 122628, 133776, 143066, 156072, 163504, 183942, 208096, 214599, 234108, 245256, 267552, 286132, 312144, 327008, 367884, 429198, 468216, 490512, 572264, 624288, 643797, 735768, 858396, 936432, 981024, 1144528, 1287594, 1471536, 1716792, 1872864, 2289056, 2575188, 2943072, 3433584, 5150376, 6867168, 10300752, 20601504.
If you add them up, you will get the total of 73,120,320.