18256820

素因数分解:

$2^2\times 5^1\times {\mathrm{661}}^1\times {\mathrm{1381}}^1$

素因数の和:2051

約数の個数: 24

約数和(自身を含む): 38425128

約数和(自身を除く): 20168308

約数列:

[1, 2, 4, 5, 10, 20, 661, 1322, 1381, 2644, 2762, 3305, 5524, 6610, 6905, 13220, 13810, 27620, 912841, 1825682, 3651364, 4564205, 9128410, 18256820]

約数ペア:

[(1, 18256820), (2, 9128410), (4, 4564205), (5, 3651364), (10, 1825682), (20, 912841), (661, 27620), (1322, 13810), (1381, 13220), (2644, 6905), (2762, 6610), (3305, 5524)]