20514915

素因数分解:

$3^2\times 5^1\times {\mathrm{643}}^1\times {\mathrm{709}}^1$

素因数の和:1363

約数の個数: 24

約数和(自身を含む): 35664720

約数和(自身を除く): 15149805

約数列:

[1, 3, 5, 9, 15, 45, 643, 709, 1929, 2127, 3215, 3545, 5787, 6381, 9645, 10635, 28935, 31905, 455887, 1367661, 2279435, 4102983, 6838305, 20514915]

約数ペア:

[(1, 20514915), (3, 6838305), (5, 4102983), (9, 2279435), (15, 1367661), (45, 455887), (643, 31905), (709, 28935), (1929, 10635), (2127, 9645), (3215, 6381), (3545, 5787)]