21090784

素因数分解:

$2^5\times {\mathrm{11}}^2\times {\mathrm{13}}^1\times {\mathrm{419}}^1$

素因数の和:464

約数の個数: 72

約数和(自身を含む): 49268520

約数和(自身を除く): 28177736

約数列:

[1, 2, 4, 8, 11, 13, 16, 22, 26, 32, 44, 52, 88, 104, 121, 143, 176, 208, 242, 286, 352, 416, 419, 484, 572, 838, 968, 1144, 1573, 1676, 1936, 2288, 3146, 3352, 3872, 4576, 4609, 5447, 6292, 6704, 9218, 10894, 12584, 13408, 18436, 21788, 25168, 36872, 43576, 50336, 50699, 59917, 73744, 87152, 101398, 119834, 147488, 174304, 202796, 239668, 405592, 479336, 659087, 811184, 958672, 1318174, 1622368, 1917344, 2636348, 5272696, 10545392, 21090784]

約数ペア:

[(1, 21090784), (2, 10545392), (4, 5272696), (8, 2636348), (11, 1917344), (13, 1622368), (16, 1318174), (22, 958672), (26, 811184), (32, 659087), (44, 479336), (52, 405592), (88, 239668), (104, 202796), (121, 174304), (143, 147488), (176, 119834), (208, 101398), (242, 87152), (286, 73744), (352, 59917), (416, 50699), (419, 50336), (484, 43576), (572, 36872), (838, 25168), (968, 21788), (1144, 18436), (1573, 13408), (1676, 12584), (1936, 10894), (2288, 9218), (3146, 6704), (3352, 6292), (3872, 5447), (4576, 4609)]