20201485

素因数分解:

$5^1\times {\mathrm{79}}^1\times {\mathrm{199}}^1\times {\mathrm{257}}^1$

素因数の和:540

約数の個数: 16

約数和(自身を含む): 24768000

約数和(自身を除く): 4566515

約数列:

[1, 5, 79, 199, 257, 395, 995, 1285, 15721, 20303, 51143, 78605, 101515, 255715, 4040297, 20201485]

約数ペア:

[(1, 20201485), (5, 4040297), (79, 255715), (199, 101515), (257, 78605), (395, 51143), (995, 20303), (1285, 15721)]