20985807

素因数分解:

$3^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1\times {\mathrm{797}}^1$

素因数の和:998

約数の個数: 16

約数和(自身を含む): 28651392

約数和(自身を除く): 7665585

約数列:

[1, 3, 67, 131, 201, 393, 797, 2391, 8777, 26331, 53399, 104407, 160197, 313221, 6995269, 20985807]

約数ペア:

[(1, 20985807), (3, 6995269), (67, 313221), (131, 160197), (201, 104407), (393, 53399), (797, 26331), (2391, 8777)]