21385760

素因数分解:

$2^5\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{419}}^1$

素因数の和:474

約数の個数: 96

約数和(自身を含む): 57153600

約数和(自身を除く): 35767840

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 32, 40, 44, 55, 58, 80, 88, 110, 116, 145, 160, 176, 220, 232, 290, 319, 352, 419, 440, 464, 580, 638, 838, 880, 928, 1160, 1276, 1595, 1676, 1760, 2095, 2320, 2552, 3190, 3352, 4190, 4609, 4640, 5104, 6380, 6704, 8380, 9218, 10208, 12151, 12760, 13408, 16760, 18436, 23045, 24302, 25520, 33520, 36872, 46090, 48604, 51040, 60755, 67040, 73744, 92180, 97208, 121510, 133661, 147488, 184360, 194416, 243020, 267322, 368720, 388832, 486040, 534644, 668305, 737440, 972080, 1069288, 1336610, 1944160, 2138576, 2673220, 4277152, 5346440, 10692880, 21385760]

約数ペア:

[(1, 21385760), (2, 10692880), (4, 5346440), (5, 4277152), (8, 2673220), (10, 2138576), (11, 1944160), (16, 1336610), (20, 1069288), (22, 972080), (29, 737440), (32, 668305), (40, 534644), (44, 486040), (55, 388832), (58, 368720), (80, 267322), (88, 243020), (110, 194416), (116, 184360), (145, 147488), (160, 133661), (176, 121510), (220, 97208), (232, 92180), (290, 73744), (319, 67040), (352, 60755), (419, 51040), (440, 48604), (464, 46090), (580, 36872), (638, 33520), (838, 25520), (880, 24302), (928, 23045), (1160, 18436), (1276, 16760), (1595, 13408), (1676, 12760), (1760, 12151), (2095, 10208), (2320, 9218), (2552, 8380), (3190, 6704), (3352, 6380), (4190, 5104), (4609, 4640)]