20819997

素因数分解:

$3^5\times {\mathrm{11}}^1\times {\mathrm{7789}}^1$

素因数の和:7815

約数の個数: 24

約数和(自身を含む): 34026720

約数和(自身を除く): 13206723

約数列:

[1, 3, 9, 11, 27, 33, 81, 99, 243, 297, 891, 2673, 7789, 23367, 70101, 85679, 210303, 257037, 630909, 771111, 1892727, 2313333, 6939999, 20819997]

約数ペア:

[(1, 20819997), (3, 6939999), (9, 2313333), (11, 1892727), (27, 771111), (33, 630909), (81, 257037), (99, 210303), (243, 85679), (297, 70101), (891, 23367), (2673, 7789)]