20715309

素因数分解:

$3^2\times {\mathrm{29}}^1\times {\mathrm{139}}^1\times {\mathrm{571}}^1$

素因数の和:745

約数の個数: 24

約数和(自身を含む): 31231200

約数和(自身を除く): 10515891

約数列:

[1, 3, 9, 29, 87, 139, 261, 417, 571, 1251, 1713, 4031, 5139, 12093, 16559, 36279, 49677, 79369, 149031, 238107, 714321, 2301701, 6905103, 20715309]

約数ペア:

[(1, 20715309), (3, 6905103), (9, 2301701), (29, 714321), (87, 238107), (139, 149031), (261, 79369), (417, 49677), (571, 36279), (1251, 16559), (1713, 12093), (4031, 5139)]