21390765

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{129641}}^1$

素因数の和:129660

約数の個数: 16

約数和(自身を含む): 37336896

約数和(自身を除く): 15946131

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 129641, 388923, 648205, 1426051, 1944615, 4278153, 7130255, 21390765]

約数ペア:

[(1, 21390765), (3, 7130255), (5, 4278153), (11, 1944615), (15, 1426051), (33, 648205), (55, 388923), (165, 129641)]