81328802020

素因数分解:

$2^2\times 5^1\times {\mathrm{144451}}^1\times {\mathrm{28151}}^1$

素因数の和:172611

約数の個数: 24

約数和(自身を含む): 170797733568

約数和(自身を除く): 89468931548

約数列:

[1, 2, 4, 5, 10, 20, 28151, 56302, 112604, 140755, 144451, 281510, 288902, 563020, 577804, 722255, 1444510, 2889020, 4066440101, 8132880202, 16265760404, 20332200505, 40664401010, 81328802020]

約数ペア:

[(1, 81328802020), (2, 40664401010), (4, 20332200505), (5, 16265760404), (10, 8132880202), (20, 4066440101), (28151, 2889020), (56302, 1444510), (112604, 722255), (140755, 577804), (144451, 563020), (281510, 288902)]