21286740

素因数分解:

$2^2\times 3^1\times 5^1\times {\mathrm{354779}}^1$

素因数の和:354791

約数の個数: 24

約数和(自身を含む): 59603040

約数和(自身を除く): 38316300

約数列:

[1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60, 354779, 709558, 1064337, 1419116, 1773895, 2128674, 3547790, 4257348, 5321685, 7095580, 10643370, 21286740]

約数ペア:

[(1, 21286740), (2, 10643370), (3, 7095580), (4, 5321685), (5, 4257348), (6, 3547790), (10, 2128674), (12, 1773895), (15, 1419116), (20, 1064337), (30, 709558), (60, 354779)]