20255.000000

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^2\times {\mathrm{263}}^1$

素因数の和:297

約数の個数: 24

約数和(自身を含む): 1159488

約数和(自身を除く): 492783

約数列:

[1, 3, 5, 13, 15, 39, 65, 169, 195, 263, 507, 789, 845, 1315, 2535, 3419, 3945, 10257, 17095, 44447, 51285, 133341, 222235, 666705]

約数ペア:

[(1, 666705), (3, 222235), (5, 133341), (13, 51285), (15, 44447), (39, 17095), (65, 10257), (169, 3945), (195, 3419), (263, 2535), (507, 1315), (789, 845)]