20720861

素因数分解:

$7^1\times {\mathrm{23}}^1\times {\mathrm{179}}^1\times {\mathrm{719}}^1$

素因数の和:928

約数の個数: 16

約数和(自身を含む): 24883200

約数和(自身を除く): 4162339

約数列:

[1, 7, 23, 161, 179, 719, 1253, 4117, 5033, 16537, 28819, 115759, 128701, 900907, 2960123, 20720861]

約数ペア:

[(1, 20720861), (7, 2960123), (23, 900907), (161, 128701), (179, 115759), (719, 28819), (1253, 16537), (4117, 5033)]