21397180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{152837}}^1$

素因数の和:152853

約数の個数: 24

約数和(自身を含む): 51353568

約数和(自身を除く): 29956388

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 152837, 305674, 611348, 764185, 1069859, 1528370, 2139718, 3056740, 4279436, 5349295, 10698590, 21397180]

約数ペア:

[(1, 21397180), (2, 10698590), (4, 5349295), (5, 4279436), (7, 3056740), (10, 2139718), (14, 1528370), (20, 1069859), (28, 764185), (35, 611348), (70, 305674), (140, 152837)]