21123804

素因数分解:

$2^2\times 3^1\times {\mathrm{13}}^1\times {\mathrm{135409}}^1$

素因数の和:135429

約数の個数: 24

約数和(自身を含む): 53080720

約数和(自身を除く): 31956916

約数列:

[1, 2, 3, 4, 6, 12, 13, 26, 39, 52, 78, 156, 135409, 270818, 406227, 541636, 812454, 1624908, 1760317, 3520634, 5280951, 7041268, 10561902, 21123804]

約数ペア:

[(1, 21123804), (2, 10561902), (3, 7041268), (4, 5280951), (6, 3520634), (12, 1760317), (13, 1624908), (26, 812454), (39, 541636), (52, 406227), (78, 270818), (156, 135409)]