81749180

素因数分解:

$2^2\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{4051}}^1$

素因数の和:5069

約数の個数: 24

約数和(自身を含む): 171885840

約数和(自身を除く): 90136660

約数列:

[1, 2, 4, 5, 10, 20, 1009, 2018, 4036, 4051, 5045, 8102, 10090, 16204, 20180, 20255, 40510, 81020, 4087459, 8174918, 16349836, 20437295, 40874590, 81749180]

約数ペア:

[(1, 81749180), (2, 40874590), (4, 20437295), (5, 16349836), (10, 8174918), (20, 4087459), (1009, 81020), (2018, 40510), (4036, 20255), (4051, 20180), (5045, 16204), (8102, 10090)]