21916604

素因数分解:

$2^2\times {\mathrm{17}}^2\times {\mathrm{18959}}^1$

素因数の和:18997

約数の個数: 18

約数和(自身を含む): 40745040

約数和(自身を除く): 18828436

約数列:

[1, 2, 4, 17, 34, 68, 289, 578, 1156, 18959, 37918, 75836, 322303, 644606, 1289212, 5479151, 10958302, 21916604]

約数ペア:

[(1, 21916604), (2, 10958302), (4, 5479151), (17, 1289212), (34, 644606), (68, 322303), (289, 75836), (578, 37918), (1156, 18959)]