21394220

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{24877}}^1$

素因数の和:24929

約数の個数: 24

約数和(自身を含む): 45974544

約数和(自身を除く): 24580324

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 24877, 49754, 99508, 124385, 248770, 497540, 1069711, 2139422, 4278844, 5348555, 10697110, 21394220]

約数ペア:

[(1, 21394220), (2, 10697110), (4, 5348555), (5, 4278844), (10, 2139422), (20, 1069711), (43, 497540), (86, 248770), (172, 124385), (215, 99508), (430, 49754), (860, 24877)]