21008781

素因数分解:

$3^3\times {\mathrm{151}}^1\times {\mathrm{5153}}^1$

素因数の和:5313

約数の個数: 16

約数和(自身を含む): 31336320

約数和(自身を除く): 10327539

約数列:

[1, 3, 9, 27, 151, 453, 1359, 4077, 5153, 15459, 46377, 139131, 778103, 2334309, 7002927, 21008781]

約数ペア:

[(1, 21008781), (3, 7002927), (9, 2334309), (27, 778103), (151, 139131), (453, 46377), (1359, 15459), (4077, 5153)]