80498020

素因数分解:

$2^2\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{3989}}^1$

素因数の和:5007

約数の個数: 24

約数和(自身を含む): 169255800

約数和(自身を除く): 88757780

約数列:

[1, 2, 4, 5, 10, 20, 1009, 2018, 3989, 4036, 5045, 7978, 10090, 15956, 19945, 20180, 39890, 79780, 4024901, 8049802, 16099604, 20124505, 40249010, 80498020]

約数ペア:

[(1, 80498020), (2, 40249010), (4, 20124505), (5, 16099604), (10, 8049802), (20, 4024901), (1009, 79780), (2018, 39890), (3989, 20180), (4036, 19945), (5045, 15956), (7978, 10090)]