19812280

素因数分解:

$2^3\times 5^1\times {\mathrm{495307}}^1$

素因数の和:495318

約数の個数: 16

約数和(自身を含む): 44577720

約数和(自身を除く): 24765440

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 495307, 990614, 1981228, 2476535, 3962456, 4953070, 9906140, 19812280]

約数ペア:

[(1, 19812280), (2, 9906140), (4, 4953070), (5, 3962456), (8, 2476535), (10, 1981228), (20, 990614), (40, 495307)]