21870291

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{263}}^1\times {\mathrm{523}}^1$

素因数の和:842

約数の個数: 16

約数和(自身を含む): 29880576

約数和(自身を除く): 8010285

約数列:

[1, 3, 53, 159, 263, 523, 789, 1569, 13939, 27719, 41817, 83157, 137549, 412647, 7290097, 21870291]

約数ペア:

[(1, 21870291), (3, 7290097), (53, 412647), (159, 137549), (263, 83157), (523, 41817), (789, 27719), (1569, 13939)]