20915817

素因数分解:

$3^1\times {\mathrm{13}}^1\times {\mathrm{181}}^1\times {\mathrm{2963}}^1$

素因数の和:3160

約数の個数: 16

約数和(自身を含む): 30209088

約数和(自身を除く): 9293271

約数列:

[1, 3, 13, 39, 181, 543, 2353, 2963, 7059, 8889, 38519, 115557, 536303, 1608909, 6971939, 20915817]

約数ペア:

[(1, 20915817), (3, 6971939), (13, 1608909), (39, 536303), (181, 115557), (543, 38519), (2353, 8889), (2963, 7059)]