19981587

素因数分解:

$3^1\times {\mathrm{61}}^1\times {\mathrm{137}}^1\times {\mathrm{797}}^1$

素因数の和:998

約数の個数: 16

約数和(自身を含む): 27310752

約数和(自身を除く): 7329165

約数列:

[1, 3, 61, 137, 183, 411, 797, 2391, 8357, 25071, 48617, 109189, 145851, 327567, 6660529, 19981587]

約数ペア:

[(1, 19981587), (3, 6660529), (61, 327567), (137, 145851), (183, 109189), (411, 48617), (797, 25071), (2391, 8357)]