21408447

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{103}}^1\times {\mathrm{877}}^1$

素因数の和:1062

約数の個数: 16

約数和(自身を含む): 29219840

約数和(自身を除く): 7811393

約数列:

[1, 3, 79, 103, 237, 309, 877, 2631, 8137, 24411, 69283, 90331, 207849, 270993, 7136149, 21408447]

約数ペア:

[(1, 21408447), (3, 7136149), (79, 270993), (103, 207849), (237, 90331), (309, 69283), (877, 24411), (2631, 8137)]