21018687

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{163}}^1\times {\mathrm{811}}^1$

素因数の和:1030

約数の個数: 16

約数和(自身を含む): 28764288

約数和(自身を除く): 7745601

約数列:

[1, 3, 53, 159, 163, 489, 811, 2433, 8639, 25917, 42983, 128949, 132193, 396579, 7006229, 21018687]

約数ペア:

[(1, 21018687), (3, 7006229), (53, 396579), (159, 132193), (163, 128949), (489, 42983), (811, 25917), (2433, 8639)]