21705585

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^2\times {\mathrm{11959}}^1$

素因数の和:11989

約数の個数: 24

約数和(自身を含む): 38176320

約数和(自身を除く): 16470735

約数列:

[1, 3, 5, 11, 15, 33, 55, 121, 165, 363, 605, 1815, 11959, 35877, 59795, 131549, 179385, 394647, 657745, 1447039, 1973235, 4341117, 7235195, 21705585]

約数ペア:

[(1, 21705585), (3, 7235195), (5, 4341117), (11, 1973235), (15, 1447039), (33, 657745), (55, 394647), (121, 179385), (165, 131549), (363, 59795), (605, 35877), (1815, 11959)]