21160971

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{10639}}^1$

素因数の和:10675

約数の個数: 24

約数和(自身を含む): 34856640

約数和(自身を除く): 13695669

約数列:

[1, 3, 9, 13, 17, 39, 51, 117, 153, 221, 663, 1989, 10639, 31917, 95751, 138307, 180863, 414921, 542589, 1244763, 1627767, 2351219, 7053657, 21160971]

約数ペア:

[(1, 21160971), (3, 7053657), (9, 2351219), (13, 1627767), (17, 1244763), (39, 542589), (51, 414921), (117, 180863), (153, 138307), (221, 95751), (663, 31917), (1989, 10639)]