21617199

素因数分解:

$3^4\times {\mathrm{31}}^1\times {\mathrm{8609}}^1$

素因数の和:8652

約数の個数: 20

約数和(自身を含む): 33337920

約数和(自身を除く): 11720721

約数列:

[1, 3, 9, 27, 31, 81, 93, 279, 837, 2511, 8609, 25827, 77481, 232443, 266879, 697329, 800637, 2401911, 7205733, 21617199]

約数ペア:

[(1, 21617199), (3, 7205733), (9, 2401911), (27, 800637), (31, 697329), (81, 266879), (93, 232443), (279, 77481), (837, 25827), (2511, 8609)]