20951920

素因数分解:

$2^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{821}}^1$

素因数の和:874

約数の個数: 80

約数和(自身を含む): 55041120

約数和(自身を除く): 34089200

約数列:

[1, 2, 4, 5, 8, 10, 11, 16, 20, 22, 29, 40, 44, 55, 58, 80, 88, 110, 116, 145, 176, 220, 232, 290, 319, 440, 464, 580, 638, 821, 880, 1160, 1276, 1595, 1642, 2320, 2552, 3190, 3284, 4105, 5104, 6380, 6568, 8210, 9031, 12760, 13136, 16420, 18062, 23809, 25520, 32840, 36124, 45155, 47618, 65680, 72248, 90310, 95236, 119045, 144496, 180620, 190472, 238090, 261899, 361240, 380944, 476180, 523798, 722480, 952360, 1047596, 1309495, 1904720, 2095192, 2618990, 4190384, 5237980, 10475960, 20951920]

約数ペア:

[(1, 20951920), (2, 10475960), (4, 5237980), (5, 4190384), (8, 2618990), (10, 2095192), (11, 1904720), (16, 1309495), (20, 1047596), (22, 952360), (29, 722480), (40, 523798), (44, 476180), (55, 380944), (58, 361240), (80, 261899), (88, 238090), (110, 190472), (116, 180620), (145, 144496), (176, 119045), (220, 95236), (232, 90310), (290, 72248), (319, 65680), (440, 47618), (464, 45155), (580, 36124), (638, 32840), (821, 25520), (880, 23809), (1160, 18062), (1276, 16420), (1595, 13136), (1642, 12760), (2320, 9031), (2552, 8210), (3190, 6568), (3284, 6380), (4105, 5104)]