21371860

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24851}}^1$

素因数の和:24903

約数の個数: 24

約数和(自身を含む): 45926496

約数和(自身を除く): 24554636

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24851, 49702, 99404, 124255, 248510, 497020, 1068593, 2137186, 4274372, 5342965, 10685930, 21371860]

約数ペア:

[(1, 21371860), (2, 10685930), (4, 5342965), (5, 4274372), (10, 2137186), (20, 1068593), (43, 497020), (86, 248510), (172, 124255), (215, 99404), (430, 49702), (860, 24851)]