18978057

素因数分解:

$3^6\times 7^1\times {\mathrm{3719}}^1$

素因数の和:3744

約数の個数: 28

約数和(自身を含む): 32527680

約数和(自身を除く): 13549623

約数列:

[1, 3, 7, 9, 21, 27, 63, 81, 189, 243, 567, 729, 1701, 3719, 5103, 11157, 26033, 33471, 78099, 100413, 234297, 301239, 702891, 903717, 2108673, 2711151, 6326019, 18978057]

約数ペア:

[(1, 18978057), (3, 6326019), (7, 2711151), (9, 2108673), (21, 903717), (27, 702891), (63, 301239), (81, 234297), (189, 100413), (243, 78099), (567, 33471), (729, 26033), (1701, 11157), (3719, 5103)]