20489565

素因数分解:

$3^1\times 5^1\times {\mathrm{641}}^1\times {\mathrm{2131}}^1$

素因数の和:2780

約数の個数: 16

約数和(自身を含む): 32849856

約数和(自身を除く): 12360291

約数列:

[1, 3, 5, 15, 641, 1923, 2131, 3205, 6393, 9615, 10655, 31965, 1365971, 4097913, 6829855, 20489565]

約数ペア:

[(1, 20489565), (3, 6829855), (5, 4097913), (15, 1365971), (641, 31965), (1923, 10655), (2131, 9615), (3205, 6393)]