18493139

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{67}}^1\times {\mathrm{131}}^1$

素因数の和:255

約数の個数: 24

約数和(自身を含む): 22511808

約数和(自身を除く): 4018669

約数列:

[1, 7, 43, 49, 67, 131, 301, 469, 917, 2107, 2881, 3283, 5633, 6419, 8777, 20167, 39431, 61439, 141169, 276017, 377411, 430073, 2641877, 18493139]

約数ペア:

[(1, 18493139), (7, 2641877), (43, 430073), (49, 377411), (67, 276017), (131, 141169), (301, 61439), (469, 39431), (917, 20167), (2107, 8777), (2881, 6419), (3283, 5633)]