28991277

素因数分解:

$3^4\times 7^1\times {\mathrm{51131}}^1$

素因数の和:51150

約数の個数: 20

約数和(自身を含む): 49495776

約数和(自身を除く): 20504499

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 51131, 153393, 357917, 460179, 1073751, 1380537, 3221253, 4141611, 9663759, 28991277]

約数ペア:

[(1, 28991277), (3, 9663759), (7, 4141611), (9, 3221253), (21, 1380537), (27, 1073751), (63, 460179), (81, 357917), (189, 153393), (567, 51131)]