18177820

素因数分解:

$2^2\times 5^1\times {\mathrm{23}}^1\times {\mathrm{43}}^1\times {\mathrm{919}}^1$

素因数の和:994

約数の個数: 48

約数和(自身を含む): 40803840

約数和(自身を除く): 22626020

約数列:

[1, 2, 4, 5, 10, 20, 23, 43, 46, 86, 92, 115, 172, 215, 230, 430, 460, 860, 919, 989, 1838, 1978, 3676, 3956, 4595, 4945, 9190, 9890, 18380, 19780, 21137, 39517, 42274, 79034, 84548, 105685, 158068, 197585, 211370, 395170, 422740, 790340, 908891, 1817782, 3635564, 4544455, 9088910, 18177820]

約数ペア:

[(1, 18177820), (2, 9088910), (4, 4544455), (5, 3635564), (10, 1817782), (20, 908891), (23, 790340), (43, 422740), (46, 395170), (86, 211370), (92, 197585), (115, 158068), (172, 105685), (215, 84548), (230, 79034), (430, 42274), (460, 39517), (860, 21137), (919, 19780), (989, 18380), (1838, 9890), (1978, 9190), (3676, 4945), (3956, 4595)]