21480220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24977}}^1$

素因数の和:25029

約数の個数: 24

約数和(自身を含む): 46159344

約数和(自身を除く): 24679124

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24977, 49954, 99908, 124885, 249770, 499540, 1074011, 2148022, 4296044, 5370055, 10740110, 21480220]

約数ペア:

[(1, 21480220), (2, 10740110), (4, 5370055), (5, 4296044), (10, 2148022), (20, 1074011), (43, 499540), (86, 249770), (172, 124885), (215, 99908), (430, 49954), (860, 24977)]