20989731

素因数分解:

$3^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{43457}}^1$

素因数の和:43490

約数の個数: 16

約数和(自身を含む): 33375744

約数和(自身を除く): 12386013

約数列:

[1, 3, 7, 21, 23, 69, 161, 483, 43457, 130371, 304199, 912597, 999511, 2998533, 6996577, 20989731]

約数ペア:

[(1, 20989731), (3, 6996577), (7, 2998533), (21, 999511), (23, 912597), (69, 304199), (161, 130371), (483, 43457)]