20005665

素因数分解:

$3^1\times 5^1\times {\mathrm{131}}^1\times {\mathrm{10181}}^1$

素因数の和:10320

約数の個数: 16

約数和(自身を含む): 32256576

約数和(自身を除く): 12250911

約数列:

[1, 3, 5, 15, 131, 393, 655, 1965, 10181, 30543, 50905, 152715, 1333711, 4001133, 6668555, 20005665]

約数ペア:

[(1, 20005665), (3, 6668555), (5, 4001133), (15, 1333711), (131, 152715), (393, 50905), (655, 30543), (1965, 10181)]