20995209

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{59}}^1\times {\mathrm{2081}}^1$

素因数の和:2165

約数の個数: 24

約数和(自身を含む): 32479200

約数和(自身を除く): 11483991

約数列:

[1, 3, 9, 19, 57, 59, 171, 177, 531, 1121, 2081, 3363, 6243, 10089, 18729, 39539, 118617, 122779, 355851, 368337, 1105011, 2332801, 6998403, 20995209]

約数ペア:

[(1, 20995209), (3, 6998403), (9, 2332801), (19, 1105011), (57, 368337), (59, 355851), (171, 122779), (177, 118617), (531, 39539), (1121, 18729), (2081, 10089), (3363, 6243)]