28657881

素因数分解:

$3^4\times 7^1\times {\mathrm{50543}}^1$

素因数の和:50562

約数の個数: 20

約数和(自身を含む): 48926592

約数和(自身を除く): 20268711

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 567, 50543, 151629, 353801, 454887, 1061403, 1364661, 3184209, 4093983, 9552627, 28657881]

約数ペア:

[(1, 28657881), (3, 9552627), (7, 4093983), (9, 3184209), (21, 1364661), (27, 1061403), (63, 454887), (81, 353801), (189, 151629), (567, 50543)]