2009018020

素因数分解:

$2^2\times 5^1\times {\mathrm{401}}^1\times {\mathrm{250501}}^1$

素因数の和:250911

約数の個数: 24

約数和(自身を含む): 4229475768

約数和(自身を除く): 2220457748

約数列:

[1, 2, 4, 5, 10, 20, 401, 802, 1604, 2005, 4010, 8020, 250501, 501002, 1002004, 1252505, 2505010, 5010020, 100450901, 200901802, 401803604, 502254505, 1004509010, 2009018020]

約数ペア:

[(1, 2009018020), (2, 1004509010), (4, 502254505), (5, 401803604), (10, 200901802), (20, 100450901), (401, 5010020), (802, 2505010), (1604, 1252505), (2005, 1002004), (4010, 501002), (8020, 250501)]