21299620

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24767}}^1$

素因数の和:24819

約数の個数: 24

約数和(自身を含む): 45771264

約数和(自身を除く): 24471644

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24767, 49534, 99068, 123835, 247670, 495340, 1064981, 2129962, 4259924, 5324905, 10649810, 21299620]

約数ペア:

[(1, 21299620), (2, 10649810), (4, 5324905), (5, 4259924), (10, 2129962), (20, 1064981), (43, 495340), (86, 247670), (172, 123835), (215, 99068), (430, 49534), (860, 24767)]