20984805

素因数分解:

$3^3\times 5^1\times {\mathrm{155443}}^1$

素因数の和:155457

約数の個数: 16

約数和(自身を含む): 37306560

約数和(自身を除く): 16321755

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 155443, 466329, 777215, 1398987, 2331645, 4196961, 6994935, 20984805]

約数ペア:

[(1, 20984805), (3, 6994935), (5, 4196961), (9, 2331645), (15, 1398987), (27, 777215), (45, 466329), (135, 155443)]