20811497

素因数分解:

$7^1\times {\mathrm{73}}^1\times {\mathrm{139}}^1\times {\mathrm{293}}^1$

素因数の和:512

約数の個数: 16

約数和(自身を含む): 24366720

約数和(自身を除く): 3555223

約数列:

[1, 7, 73, 139, 293, 511, 973, 2051, 10147, 21389, 40727, 71029, 149723, 285089, 2973071, 20811497]

約数ペア:

[(1, 20811497), (7, 2973071), (73, 285089), (139, 149723), (293, 71029), (511, 40727), (973, 21389), (2051, 10147)]