21893020

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25457}}^1$

素因数の和:25509

約数の個数: 24

約数和(自身を含む): 47046384

約数和(自身を除く): 25153364

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25457, 50914, 101828, 127285, 254570, 509140, 1094651, 2189302, 4378604, 5473255, 10946510, 21893020]

約数ペア:

[(1, 21893020), (2, 10946510), (4, 5473255), (5, 4378604), (10, 2189302), (20, 1094651), (43, 509140), (86, 254570), (172, 127285), (215, 101828), (430, 50914), (860, 25457)]