21124540

素因数分解:

$2^2\times 5^1\times {\mathrm{17}}^1\times {\mathrm{62131}}^1$

素因数の和:62157

約数の個数: 24

約数和(自身を含む): 46971792

約数和(自身を除く): 25847252

約数列:

[1, 2, 4, 5, 10, 17, 20, 34, 68, 85, 170, 340, 62131, 124262, 248524, 310655, 621310, 1056227, 1242620, 2112454, 4224908, 5281135, 10562270, 21124540]

約数ペア:

[(1, 21124540), (2, 10562270), (4, 5281135), (5, 4224908), (10, 2112454), (17, 1242620), (20, 1056227), (34, 621310), (68, 310655), (85, 248524), (170, 124262), (340, 62131)]