21128728

素因数分解:

$2^3\times {\mathrm{131}}^1\times {\mathrm{20161}}^1$

素因数の和:20298

約数の個数: 16

約数和(自身を含む): 39920760

約数和(自身を除く): 18792032

約数列:

[1, 2, 4, 8, 131, 262, 524, 1048, 20161, 40322, 80644, 161288, 2641091, 5282182, 10564364, 21128728]

約数ペア:

[(1, 21128728), (2, 10564364), (4, 5282182), (8, 2641091), (131, 161288), (262, 80644), (524, 40322), (1048, 20161)]