21159028

素因数分解:

$2^2\times {\mathrm{11}}^2\times {\mathrm{43717}}^1$

素因数の和:43743

約数の個数: 18

約数和(自身を含む): 40701458

約数和(自身を除く): 19542430

約数列:

[1, 2, 4, 11, 22, 44, 121, 242, 484, 43717, 87434, 174868, 480887, 961774, 1923548, 5289757, 10579514, 21159028]

約数ペア:

[(1, 21159028), (2, 10579514), (4, 5289757), (11, 1923548), (22, 961774), (44, 480887), (121, 174868), (242, 87434), (484, 43717)]