21244145

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{31}}^1\times {\mathrm{811}}^1$

素因数の和:873

約数の個数: 24

約数和(自身を含む): 28530432

約数和(自身を除く): 7286287

約数列:

[1, 5, 13, 31, 65, 155, 169, 403, 811, 845, 2015, 4055, 5239, 10543, 25141, 26195, 52715, 125705, 137059, 326833, 685295, 1634165, 4248829, 21244145]

約数ペア:

[(1, 21244145), (5, 4248829), (13, 1634165), (31, 685295), (65, 326833), (155, 137059), (169, 125705), (403, 52715), (811, 26195), (845, 25141), (2015, 10543), (4055, 5239)]