20508020

素因数分解:

$2^2\times 5^1\times {\mathrm{13}}^1\times {\mathrm{78877}}^1$

素因数の和:78899

約数の個数: 24

約数和(自身を含む): 46380264

約数和(自身を除く): 25872244

約数列:

[1, 2, 4, 5, 10, 13, 20, 26, 52, 65, 130, 260, 78877, 157754, 315508, 394385, 788770, 1025401, 1577540, 2050802, 4101604, 5127005, 10254010, 20508020]

約数ペア:

[(1, 20508020), (2, 10254010), (4, 5127005), (5, 4101604), (10, 2050802), (13, 1577540), (20, 1025401), (26, 788770), (52, 394385), (65, 315508), (130, 157754), (260, 78877)]