21490023

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{4091}}^1$

素因数の和:4214

約数の個数: 16

約数和(自身を含む): 30640896

約数和(自身を除く): 9150873

約数列:

[1, 3, 17, 51, 103, 309, 1751, 4091, 5253, 12273, 69547, 208641, 421373, 1264119, 7163341, 21490023]

約数ペア:

[(1, 21490023), (3, 7163341), (17, 1264119), (51, 421373), (103, 208641), (309, 69547), (1751, 12273), (4091, 5253)]