18658445

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{311}}^1$

素因数の和:413

約数の個数: 24

約数和(自身を含む): 24665472

約数和(自身を除く): 6007027

約数列:

[1, 5, 13, 65, 71, 169, 311, 355, 845, 923, 1555, 4043, 4615, 11999, 20215, 22081, 52559, 59995, 110405, 262795, 287053, 1435265, 3731689, 18658445]

約数ペア:

[(1, 18658445), (5, 3731689), (13, 1435265), (65, 287053), (71, 262795), (169, 110405), (311, 59995), (355, 52559), (845, 22081), (923, 20215), (1555, 11999), (4043, 4615)]