20985021

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{131}}^1\times {\mathrm{349}}^1$

素因数の和:506

約数の個数: 32

約数和(自身を含む): 33264000

約数和(自身を除く): 12278979

約数列:

[1, 3, 9, 17, 27, 51, 131, 153, 349, 393, 459, 1047, 1179, 2227, 3141, 3537, 5933, 6681, 9423, 17799, 20043, 45719, 53397, 60129, 137157, 160191, 411471, 777223, 1234413, 2331669, 6995007, 20985021]

約数ペア:

[(1, 20985021), (3, 6995007), (9, 2331669), (17, 1234413), (27, 777223), (51, 411471), (131, 160191), (153, 137157), (349, 60129), (393, 53397), (459, 45719), (1047, 20043), (1179, 17799), (2227, 9423), (3141, 6681), (3537, 5933)]