21815620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25367}}^1$

素因数の和:25419

約数の個数: 24

約数和(自身を含む): 46880064

約数和(自身を除く): 25064444

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25367, 50734, 101468, 126835, 253670, 507340, 1090781, 2181562, 4363124, 5453905, 10907810, 21815620]

約数ペア:

[(1, 21815620), (2, 10907810), (4, 5453905), (5, 4363124), (10, 2181562), (20, 1090781), (43, 507340), (86, 253670), (172, 126835), (215, 101468), (430, 50734), (860, 25367)]