21758391

素因数分解:

$3^2\times {\mathrm{23}}^1\times {\mathrm{257}}^1\times {\mathrm{409}}^1$

素因数の和:695

約数の個数: 24

約数和(自身を含む): 33003360

約数和(自身を除く): 11244969

約数列:

[1, 3, 9, 23, 69, 207, 257, 409, 771, 1227, 2313, 3681, 5911, 9407, 17733, 28221, 53199, 84663, 105113, 315339, 946017, 2417599, 7252797, 21758391]

約数ペア:

[(1, 21758391), (3, 7252797), (9, 2417599), (23, 946017), (69, 315339), (207, 105113), (257, 84663), (409, 53199), (771, 28221), (1227, 17733), (2313, 9407), (3681, 5911)]