20686671

素因数分解:

$3^4\times {\mathrm{17}}^1\times {\mathrm{83}}^1\times {\mathrm{181}}^1$

素因数の和:293

約数の個数: 40

約数和(自身を含む): 33297264

約数和(自身を除く): 12610593

約数列:

[1, 3, 9, 17, 27, 51, 81, 83, 153, 181, 249, 459, 543, 747, 1377, 1411, 1629, 2241, 3077, 4233, 4887, 6723, 9231, 12699, 14661, 15023, 27693, 38097, 45069, 83079, 114291, 135207, 249237, 255391, 405621, 766173, 1216863, 2298519, 6895557, 20686671]

約数ペア:

[(1, 20686671), (3, 6895557), (9, 2298519), (17, 1216863), (27, 766173), (51, 405621), (81, 255391), (83, 249237), (153, 135207), (181, 114291), (249, 83079), (459, 45069), (543, 38097), (747, 27693), (1377, 15023), (1411, 14661), (1629, 12699), (2241, 9231), (3077, 6723), (4233, 4887)]