840220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{977}}^1$

素因数の和:1029

約数の個数: 24

約数和(自身を含む): 1807344

約数和(自身を除く): 967124

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 977, 1954, 3908, 4885, 9770, 19540, 42011, 84022, 168044, 210055, 420110, 840220]

約数ペア:

[(1, 840220), (2, 420110), (4, 210055), (5, 168044), (10, 84022), (20, 42011), (43, 19540), (86, 9770), (172, 4885), (215, 3908), (430, 1954), (860, 977)]