20638387

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{109}}^1\times {\mathrm{2459}}^1$

素因数の和:2586

約数の個数: 16

約数和(自身を含む): 25977600

約数和(自身を除く): 5339213

約数列:

[1, 7, 11, 77, 109, 763, 1199, 2459, 8393, 17213, 27049, 189343, 268031, 1876217, 2948341, 20638387]

約数ペア:

[(1, 20638387), (7, 2948341), (11, 1876217), (77, 268031), (109, 189343), (763, 27049), (1199, 17213), (2459, 8393)]