20811897

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13523}}^1$

素因数の和:13554

約数の個数: 20

約数和(自身を含む): 32728080

約数和(自身を除く): 11916183

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13523, 40569, 121707, 256937, 365121, 770811, 1095363, 2312433, 6937299, 20811897]

約数ペア:

[(1, 20811897), (3, 6937299), (9, 2312433), (19, 1095363), (27, 770811), (57, 365121), (81, 256937), (171, 121707), (513, 40569), (1539, 13523)]