20555721

素因数分解:

$3^3\times {\mathrm{23}}^1\times {\mathrm{79}}^1\times {\mathrm{419}}^1$

素因数の和:530

約数の個数: 32

約数和(自身を含む): 32256000

約数和(自身を除く): 11700279

約数列:

[1, 3, 9, 23, 27, 69, 79, 207, 237, 419, 621, 711, 1257, 1817, 2133, 3771, 5451, 9637, 11313, 16353, 28911, 33101, 49059, 86733, 99303, 260199, 297909, 761323, 893727, 2283969, 6851907, 20555721]

約数ペア:

[(1, 20555721), (3, 6851907), (9, 2283969), (23, 893727), (27, 761323), (69, 297909), (79, 260199), (207, 99303), (237, 86733), (419, 49059), (621, 33101), (711, 28911), (1257, 16353), (1817, 11313), (2133, 9637), (3771, 5451)]