20847905

素因数分解:

$5^1\times {\mathrm{13}}^1\times {\mathrm{43}}^1\times {\mathrm{7459}}^1$

素因数の和:7520

約数の個数: 16

約数和(自身を含む): 27572160

約数和(自身を除く): 6724255

約数列:

[1, 5, 13, 43, 65, 215, 559, 2795, 7459, 37295, 96967, 320737, 484835, 1603685, 4169581, 20847905]

約数ペア:

[(1, 20847905), (5, 4169581), (13, 1603685), (43, 484835), (65, 320737), (215, 96967), (559, 37295), (2795, 7459)]