20997176

素因数分解:

$2^3\times {\mathrm{17}}^1\times {\mathrm{61}}^1\times {\mathrm{2531}}^1$

素因数の和:2615

約数の個数: 32

約数和(自身を含む): 42385680

約数和(自身を除く): 21388504

約数列:

[1, 2, 4, 8, 17, 34, 61, 68, 122, 136, 244, 488, 1037, 2074, 2531, 4148, 5062, 8296, 10124, 20248, 43027, 86054, 154391, 172108, 308782, 344216, 617564, 1235128, 2624647, 5249294, 10498588, 20997176]

約数ペア:

[(1, 20997176), (2, 10498588), (4, 5249294), (8, 2624647), (17, 1235128), (34, 617564), (61, 344216), (68, 308782), (122, 172108), (136, 154391), (244, 86054), (488, 43027), (1037, 20248), (2074, 10124), (2531, 8296), (4148, 5062)]