20401389

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4129}}^1$

素因数の和:4202

約数の個数: 20

約数和(自身を含む): 30983260

約数和(自身を除く): 10581871

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4129, 4941, 12387, 37161, 111483, 251869, 334449, 755607, 2266821, 6800463, 20401389]

約数ペア:

[(1, 20401389), (3, 6800463), (9, 2266821), (27, 755607), (61, 334449), (81, 251869), (183, 111483), (549, 37161), (1647, 12387), (4129, 4941)]