20906440

素因数分解:

$2^3\times 5^1\times {\mathrm{522661}}^1$

素因数の和:522672

約数の個数: 16

約数和(自身を含む): 47039580

約数和(自身を除く): 26133140

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 522661, 1045322, 2090644, 2613305, 4181288, 5226610, 10453220, 20906440]

約数ペア:

[(1, 20906440), (2, 10453220), (4, 5226610), (5, 4181288), (8, 2613305), (10, 2090644), (20, 1045322), (40, 522661)]