20397987

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{10949}}^1$

素因数の和:10984

約数の個数: 20

約数和(自身を含む): 31798800

約数和(自身を除く): 11400813

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 10949, 32847, 98541, 251827, 295623, 755481, 886869, 2266443, 6799329, 20397987]

約数ペア:

[(1, 20397987), (3, 6799329), (9, 2266443), (23, 886869), (27, 755481), (69, 295623), (81, 251827), (207, 98541), (621, 32847), (1863, 10949)]