20905059

素因数分解:

$3^1\times 7^1\times {\mathrm{79}}^1\times {\mathrm{12601}}^1$

素因数の和:12690

約数の個数: 16

約数和(自身を含む): 32261120

約数和(自身を除く): 11356061

約数列:

[1, 3, 7, 21, 79, 237, 553, 1659, 12601, 37803, 88207, 264621, 995479, 2986437, 6968353, 20905059]

約数ペア:

[(1, 20905059), (3, 6968353), (7, 2986437), (21, 995479), (79, 264621), (237, 88207), (553, 37803), (1659, 12601)]