20815947

素因数分解:

$3^4\times {\mathrm{79}}^1\times {\mathrm{3253}}^1$

素因数の和:3344

約数の個数: 20

約数和(自身を含む): 31498720

約数和(自身を除く): 10682773

約数列:

[1, 3, 9, 27, 79, 81, 237, 711, 2133, 3253, 6399, 9759, 29277, 87831, 256987, 263493, 770961, 2312883, 6938649, 20815947]

約数ペア:

[(1, 20815947), (3, 6938649), (9, 2312883), (27, 770961), (79, 263493), (81, 256987), (237, 87831), (711, 29277), (2133, 9759), (3253, 6399)]