20997290

素因数分解:

$2^1\times 5^1\times {\mathrm{1009}}^1\times {\mathrm{2081}}^1$

素因数の和:3097

約数の個数: 16

約数和(自身を含む): 37850760

約数和(自身を除く): 16853470

約数列:

[1, 2, 5, 10, 1009, 2018, 2081, 4162, 5045, 10090, 10405, 20810, 2099729, 4199458, 10498645, 20997290]

約数ペア:

[(1, 20997290), (2, 10498645), (5, 4199458), (10, 2099729), (1009, 20810), (2018, 10405), (2081, 10090), (4162, 5045)]