21121359

素因数分解:

$3^1\times 7^1\times {\mathrm{739}}^1\times {\mathrm{1361}}^1$

素因数の和:2110

約数の個数: 16

約数和(自身を含む): 32252160

約数和(自身を除く): 11130801

約数列:

[1, 3, 7, 21, 739, 1361, 2217, 4083, 5173, 9527, 15519, 28581, 1005779, 3017337, 7040453, 21121359]

約数ペア:

[(1, 21121359), (3, 7040453), (7, 3017337), (21, 1005779), (739, 28581), (1361, 15519), (2217, 9527), (4083, 5173)]