18989929

素因数分解:

$7^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{521}}^1$

素因数の和:696

約数の個数: 16

約数和(自身を含む): 22450176

約数和(自身を除く): 3460247

約数列:

[1, 7, 41, 127, 287, 521, 889, 3647, 5207, 21361, 36449, 66167, 149527, 463169, 2712847, 18989929]

約数ペア:

[(1, 18989929), (7, 2712847), (41, 463169), (127, 149527), (287, 66167), (521, 36449), (889, 21361), (3647, 5207)]