20661188

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{61}}^1\times {\mathrm{293}}^1$

素因数の和:392

約数の個数: 36

約数和(自身を含む): 39171972

約数和(自身を除く): 18510784

約数列:

[1, 2, 4, 17, 34, 61, 68, 122, 244, 289, 293, 578, 586, 1037, 1156, 1172, 2074, 4148, 4981, 9962, 17629, 17873, 19924, 35258, 35746, 70516, 71492, 84677, 169354, 303841, 338708, 607682, 1215364, 5165297, 10330594, 20661188]

約数ペア:

[(1, 20661188), (2, 10330594), (4, 5165297), (17, 1215364), (34, 607682), (61, 338708), (68, 303841), (122, 169354), (244, 84677), (289, 71492), (293, 70516), (578, 35746), (586, 35258), (1037, 19924), (1156, 17873), (1172, 17629), (2074, 9962), (4148, 4981)]