21806806

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{67723}}^1$

素因数の和:67755

約数の個数: 16

約数和(自身を含む): 39009024

約数和(自身を除く): 17202218

約数列:

[1, 2, 7, 14, 23, 46, 161, 322, 67723, 135446, 474061, 948122, 1557629, 3115258, 10903403, 21806806]

約数ペア:

[(1, 21806806), (2, 10903403), (7, 3115258), (14, 1557629), (23, 948122), (46, 474061), (161, 135446), (322, 67723)]