17920917

素因数分解:

$3^2\times 7^2\times {\mathrm{40637}}^1$

素因数の和:40657

約数の個数: 18

約数和(自身を含む): 30112758

約数和(自身を除く): 12191841

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 40637, 121911, 284459, 365733, 853377, 1991213, 2560131, 5973639, 17920917]

約数ペア:

[(1, 17920917), (3, 5973639), (7, 2560131), (9, 1991213), (21, 853377), (49, 365733), (63, 284459), (147, 121911), (441, 40637)]