20728791

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13469}}^1$

素因数の和:13500

約数の個数: 20

約数和(自身を含む): 32597400

約数和(自身を除く): 11868609

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13469, 40407, 121221, 255911, 363663, 767733, 1090989, 2303199, 6909597, 20728791]

約数ペア:

[(1, 20728791), (3, 6909597), (9, 2303199), (19, 1090989), (27, 767733), (57, 363663), (81, 255911), (171, 121221), (513, 40407), (1539, 13469)]