20721597

素因数分解:

$3^1\times {\mathrm{13}}^2\times {\mathrm{23}}^1\times {\mathrm{1777}}^1$

素因数の和:1829

約数の個数: 24

約数和(自身を含む): 31235904

約数和(自身を除く): 10514307

約数列:

[1, 3, 13, 23, 39, 69, 169, 299, 507, 897, 1777, 3887, 5331, 11661, 23101, 40871, 69303, 122613, 300313, 531323, 900939, 1593969, 6907199, 20721597]

約数ペア:

[(1, 20721597), (3, 6907199), (13, 1593969), (23, 900939), (39, 531323), (69, 300313), (169, 122613), (299, 69303), (507, 40871), (897, 23101), (1777, 11661), (3887, 5331)]