20913910

素因数分解:

$2^1\times 5^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2861}}^1$

素因数の和:2928

約数の個数: 32

約数和(自身を含む): 40800672

約数和(自身を除く): 19886762

約数列:

[1, 2, 5, 10, 17, 34, 43, 85, 86, 170, 215, 430, 731, 1462, 2861, 3655, 5722, 7310, 14305, 28610, 48637, 97274, 123023, 243185, 246046, 486370, 615115, 1230230, 2091391, 4182782, 10456955, 20913910]

約数ペア:

[(1, 20913910), (2, 10456955), (5, 4182782), (10, 2091391), (17, 1230230), (34, 615115), (43, 486370), (85, 246046), (86, 243185), (170, 123023), (215, 97274), (430, 48637), (731, 28610), (1462, 14305), (2861, 7310), (3655, 5722)]