20815240

素因数分解:

$2^3\times 5^1\times {\mathrm{520381}}^1$

素因数の和:520392

約数の個数: 16

約数和(自身を含む): 46834380

約数和(自身を除く): 26019140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520381, 1040762, 2081524, 2601905, 4163048, 5203810, 10407620, 20815240]

約数ペア:

[(1, 20815240), (2, 10407620), (4, 5203810), (5, 4163048), (8, 2601905), (10, 2081524), (20, 1040762), (40, 520381)]