20809251

素因数分解:

$3^3\times {\mathrm{157}}^1\times {\mathrm{4909}}^1$

素因数の和:5075

約数の個数: 16

約数和(自身を含む): 31031200

約数和(自身を除く): 10221949

約数列:

[1, 3, 9, 27, 157, 471, 1413, 4239, 4909, 14727, 44181, 132543, 770713, 2312139, 6936417, 20809251]

約数ペア:

[(1, 20809251), (3, 6936417), (9, 2312139), (27, 770713), (157, 132543), (471, 44181), (1413, 14727), (4239, 4909)]