21130864

素因数分解:

$2^4\times {\mathrm{17}}^1\times {\mathrm{77687}}^1$

素因数の和:77712

約数の個数: 20

約数和(自身を含む): 43349904

約数和(自身を除く): 22219040

約数列:

[1, 2, 4, 8, 16, 17, 34, 68, 136, 272, 77687, 155374, 310748, 621496, 1242992, 1320679, 2641358, 5282716, 10565432, 21130864]

約数ペア:

[(1, 21130864), (2, 10565432), (4, 5282716), (8, 2641358), (16, 1320679), (17, 1242992), (34, 621496), (68, 310748), (136, 155374), (272, 77687)]