18271561

素因数分解:

$7^2\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{311}}^1$

素因数の和:445

約数の個数: 24

約数和(自身を含む): 23474880

約数和(自身を除く): 5203319

約数列:

[1, 7, 11, 49, 77, 109, 311, 539, 763, 1199, 2177, 3421, 5341, 8393, 15239, 23947, 33899, 58751, 167629, 237293, 372889, 1661051, 2610223, 18271561]

約数ペア:

[(1, 18271561), (7, 2610223), (11, 1661051), (49, 372889), (77, 237293), (109, 167629), (311, 58751), (539, 33899), (763, 23947), (1199, 15239), (2177, 8393), (3421, 5341)]