21550123

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{311}}^1\times {\mathrm{521}}^1$

素因数の和:858

約数の個数: 16

約数和(自身を含む): 26058240

約数和(自身を除く): 4508117

約数列:

[1, 7, 19, 133, 311, 521, 2177, 3647, 5909, 9899, 41363, 69293, 162031, 1134217, 3078589, 21550123]

約数ペア:

[(1, 21550123), (7, 3078589), (19, 1134217), (133, 162031), (311, 69293), (521, 41363), (2177, 9899), (3647, 5909)]