18420561

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{18439}}^1$

素因数の和:18485

約数の個数: 16

約数和(自身を含む): 28028800

約数和(自身を除く): 9608239

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 18439, 55317, 165951, 497853, 682243, 2046729, 6140187, 18420561]

約数ペア:

[(1, 18420561), (3, 6140187), (9, 2046729), (27, 682243), (37, 497853), (111, 165951), (333, 55317), (999, 18439)]