21890817

素因数分解:

$3^4\times {\mathrm{13}}^1\times {\mathrm{20789}}^1$

素因数の和:20814

約数の個数: 20

約数和(自身を含む): 35218260

約数和(自身を除く): 13327443

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 351, 1053, 20789, 62367, 187101, 270257, 561303, 810771, 1683909, 2432313, 7296939, 21890817]

約数ペア:

[(1, 21890817), (3, 7296939), (9, 2432313), (13, 1683909), (27, 810771), (39, 561303), (81, 270257), (117, 187101), (351, 62367), (1053, 20789)]