20971521

素因数分解:

$3^3\times {\mathrm{103}}^1\times {\mathrm{7541}}^1$

素因数の和:7653

約数の個数: 16

約数和(自身を含む): 31374720

約数和(自身を除く): 10403199

約数列:

[1, 3, 9, 27, 103, 309, 927, 2781, 7541, 22623, 67869, 203607, 776723, 2330169, 6990507, 20971521]

約数ペア:

[(1, 20971521), (3, 6990507), (9, 2330169), (27, 776723), (103, 203607), (309, 67869), (927, 22623), (2781, 7541)]