20428807

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{223}}^1\times {\mathrm{569}}^1$

素因数の和:822

約数の個数: 16

約数和(自身を含む): 24514560

約数和(自身を除く): 4085753

約数列:

[1, 7, 23, 161, 223, 569, 1561, 3983, 5129, 13087, 35903, 91609, 126887, 888209, 2918401, 20428807]

約数ペア:

[(1, 20428807), (7, 2918401), (23, 888209), (161, 126887), (223, 91609), (569, 35903), (1561, 13087), (3983, 5129)]