21086709

素因数分解:

$3^1\times 7^2\times {\mathrm{67}}^1\times {\mathrm{2141}}^1$

素因数の和:2225

約数の個数: 24

約数和(自身を含む): 33209568

約数和(自身を除く): 12122859

約数列:

[1, 3, 7, 21, 49, 67, 147, 201, 469, 1407, 2141, 3283, 6423, 9849, 14987, 44961, 104909, 143447, 314727, 430341, 1004129, 3012387, 7028903, 21086709]

約数ペア:

[(1, 21086709), (3, 7028903), (7, 3012387), (21, 1004129), (49, 430341), (67, 314727), (147, 143447), (201, 104909), (469, 44961), (1407, 14987), (2141, 9849), (3283, 6423)]