20806551

素因数分解:

$3^4\times {\mathrm{61}}^1\times {\mathrm{4211}}^1$

素因数の和:4284

約数の個数: 20

約数和(自身を含む): 31598424

約数和(自身を除く): 10791873

約数列:

[1, 3, 9, 27, 61, 81, 183, 549, 1647, 4211, 4941, 12633, 37899, 113697, 256871, 341091, 770613, 2311839, 6935517, 20806551]

約数ペア:

[(1, 20806551), (3, 6935517), (9, 2311839), (27, 770613), (61, 341091), (81, 256871), (183, 113697), (549, 37899), (1647, 12633), (4211, 4941)]