21309526

素因数分解:

$2^1\times 7^1\times {\mathrm{19}}^1\times {\mathrm{80111}}^1$

素因数の和:80139

約数の個数: 16

約数和(自身を含む): 38453760

約数和(自身を除く): 17144234

約数列:

[1, 2, 7, 14, 19, 38, 133, 266, 80111, 160222, 560777, 1121554, 1522109, 3044218, 10654763, 21309526]

約数ペア:

[(1, 21309526), (2, 10654763), (7, 3044218), (14, 1522109), (19, 1121554), (38, 560777), (133, 160222), (266, 80111)]