20990020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24407}}^1$

素因数の和:24459

約数の個数: 24

約数和(自身を含む): 45105984

約数和(自身を除く): 24115964

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24407, 48814, 97628, 122035, 244070, 488140, 1049501, 2099002, 4198004, 5247505, 10495010, 20990020]

約数ペア:

[(1, 20990020), (2, 10495010), (4, 5247505), (5, 4198004), (10, 2099002), (20, 1049501), (43, 488140), (86, 244070), (172, 122035), (215, 97628), (430, 48814), (860, 24407)]