81166460

素因数分解:

$2^2\times 5^1\times {\mathrm{443}}^1\times {\mathrm{9161}}^1$

素因数の和:9613

約数の個数: 24

約数和(自身を含む): 170852976

約数和(自身を除く): 89686516

約数列:

[1, 2, 4, 5, 10, 20, 443, 886, 1772, 2215, 4430, 8860, 9161, 18322, 36644, 45805, 91610, 183220, 4058323, 8116646, 16233292, 20291615, 40583230, 81166460]

約数ペア:

[(1, 81166460), (2, 40583230), (4, 20291615), (5, 16233292), (10, 8116646), (20, 4058323), (443, 183220), (886, 91610), (1772, 45805), (2215, 36644), (4430, 18322), (8860, 9161)]