19997180

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{142837}}^1$

素因数の和:142853

約数の個数: 24

約数和(自身を含む): 47993568

約数和(自身を除く): 27996388

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 140, 142837, 285674, 571348, 714185, 999859, 1428370, 1999718, 2856740, 3999436, 4999295, 9998590, 19997180]

約数ペア:

[(1, 19997180), (2, 9998590), (4, 4999295), (5, 3999436), (7, 2856740), (10, 1999718), (14, 1428370), (20, 999859), (28, 714185), (35, 571348), (70, 285674), (140, 142837)]