21908811

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{149}}^1\times {\mathrm{2131}}^1$

素因数の和:2306

約数の個数: 16

約数和(自身を含む): 30700800

約数和(自身を除く): 8791989

約数列:

[1, 3, 23, 69, 149, 447, 2131, 3427, 6393, 10281, 49013, 147039, 317519, 952557, 7302937, 21908811]

約数ペア:

[(1, 21908811), (3, 7302937), (23, 952557), (69, 317519), (149, 147039), (447, 49013), (2131, 10281), (3427, 6393)]