20897359

素因数分解:

$7^1\times {\mathrm{19}}^1\times {\mathrm{71}}^1\times {\mathrm{2213}}^1$

素因数の和:2310

約数の個数: 16

約数和(自身を含む): 25505280

約数和(自身を除く): 4607921

約数列:

[1, 7, 19, 71, 133, 497, 1349, 2213, 9443, 15491, 42047, 157123, 294329, 1099861, 2985337, 20897359]

約数ペア:

[(1, 20897359), (7, 2985337), (19, 1099861), (71, 294329), (133, 157123), (497, 42047), (1349, 15491), (2213, 9443)]