21200123

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{131}}^1\times {\mathrm{379}}^1$

素因数の和:578

約数の個数: 16

約数和(自身を含む): 24879360

約数和(自身を除く): 3679237

約数列:

[1, 7, 61, 131, 379, 427, 917, 2653, 7991, 23119, 49649, 55937, 161833, 347543, 3028589, 21200123]

約数ペア:

[(1, 21200123), (7, 3028589), (61, 347543), (131, 161833), (379, 55937), (427, 49649), (917, 23119), (2653, 7991)]