21906521

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{67}}^1\times {\mathrm{3593}}^1$

素因数の和:3680

約数の個数: 16

約数和(自身を含む): 27371904

約数和(自身を除く): 5465383

約数列:

[1, 7, 13, 67, 91, 469, 871, 3593, 6097, 25151, 46709, 240731, 326963, 1685117, 3129503, 21906521]

約数ペア:

[(1, 21906521), (7, 3129503), (13, 1685117), (67, 326963), (91, 240731), (469, 46709), (871, 25151), (3593, 6097)]