20837889

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{233}}^1\times {\mathrm{523}}^1$

素因数の和:781

約数の個数: 24

約数和(自身を含む): 31880160

約数和(自身を除く): 11042271

約数列:

[1, 3, 9, 19, 57, 171, 233, 523, 699, 1569, 2097, 4427, 4707, 9937, 13281, 29811, 39843, 89433, 121859, 365577, 1096731, 2315321, 6945963, 20837889]

約数ペア:

[(1, 20837889), (3, 6945963), (9, 2315321), (19, 1096731), (57, 365577), (171, 121859), (233, 89433), (523, 39843), (699, 29811), (1569, 13281), (2097, 9937), (4427, 4707)]