805210820

素因数分解:

$2^2\times 5^1\times {\mathrm{2143}}^1\times {\mathrm{18787}}^1$

素因数の和:20939

約数の個数: 24

約数和(自身を含む): 1691821824

約数和(自身を除く): 886611004

約数列:

[1, 2, 4, 5, 10, 20, 2143, 4286, 8572, 10715, 18787, 21430, 37574, 42860, 75148, 93935, 187870, 375740, 40260541, 80521082, 161042164, 201302705, 402605410, 805210820]

約数ペア:

[(1, 805210820), (2, 402605410), (4, 201302705), (5, 161042164), (10, 80521082), (20, 40260541), (2143, 375740), (4286, 187870), (8572, 93935), (10715, 75148), (18787, 42860), (21430, 37574)]