28721709

素因数分解:

$3^4\times {\mathrm{139}}^1\times {\mathrm{2551}}^1$

素因数の和:2702

約数の個数: 20

約数和(自身を含む): 43230880

約数和(自身を除く): 14509171

約数列:

[1, 3, 9, 27, 81, 139, 417, 1251, 2551, 3753, 7653, 11259, 22959, 68877, 206631, 354589, 1063767, 3191301, 9573903, 28721709]

約数ペア:

[(1, 28721709), (3, 9573903), (9, 3191301), (27, 1063767), (81, 354589), (139, 206631), (417, 68877), (1251, 22959), (2551, 11259), (3753, 7653)]