21217779

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{107}}^1\times {\mathrm{2003}}^1$

素因数の和:2127

約数の個数: 24

約数和(自身を含む): 33763392

約数和(自身を除く): 12545613

約数列:

[1, 3, 9, 11, 33, 99, 107, 321, 963, 1177, 2003, 3531, 6009, 10593, 18027, 22033, 66099, 198297, 214321, 642963, 1928889, 2357531, 7072593, 21217779]

約数ペア:

[(1, 21217779), (3, 7072593), (9, 2357531), (11, 1928889), (33, 642963), (99, 214321), (107, 198297), (321, 66099), (963, 22033), (1177, 18027), (2003, 10593), (3531, 6009)]