21905060

素因数分解:

$2^2\times 5^1\times {\mathrm{43}}^1\times {\mathrm{25471}}^1$

素因数の和:25523

約数の個数: 24

約数和(自身を含む): 47072256

約数和(自身を除く): 25167196

約数列:

[1, 2, 4, 5, 10, 20, 43, 86, 172, 215, 430, 860, 25471, 50942, 101884, 127355, 254710, 509420, 1095253, 2190506, 4381012, 5476265, 10952530, 21905060]

約数ペア:

[(1, 21905060), (2, 10952530), (4, 5476265), (5, 4381012), (10, 2190506), (20, 1095253), (43, 509420), (86, 254710), (172, 127355), (215, 101884), (430, 50942), (860, 25471)]