19886715

素因数分解:

$3^4\times 5^1\times {\mathrm{49103}}^1$

素因数の和:49120

約数の個数: 20

約数和(自身を含む): 35649504

約数和(自身を除く): 15762789

約数列:

[1, 3, 5, 9, 15, 27, 45, 81, 135, 405, 49103, 147309, 245515, 441927, 736545, 1325781, 2209635, 3977343, 6628905, 19886715]

約数ペア:

[(1, 19886715), (3, 6628905), (5, 3977343), (9, 2209635), (15, 1325781), (27, 736545), (45, 441927), (81, 245515), (135, 147309), (405, 49103)]