28080405

素因数分解:

$3^3\times 5^1\times {\mathrm{208003}}^1$

素因数の和:208017

約数の個数: 16

約数和(自身を含む): 49920960

約数和(自身を除く): 21840555

約数列:

[1, 3, 5, 9, 15, 27, 45, 135, 208003, 624009, 1040015, 1872027, 3120045, 5616081, 9360135, 28080405]

約数ペア:

[(1, 28080405), (3, 9360135), (5, 5616081), (9, 3120045), (15, 1872027), (27, 1040015), (45, 624009), (135, 208003)]