21556561

素因数分解:

${\mathrm{13}}^1\times {\mathrm{17}}^1\times {\mathrm{103}}^1\times {\mathrm{947}}^1$

素因数の和:1080

約数の個数: 16

約数和(自身を含む): 24845184

約数和(自身を除く): 3288623

約数列:

[1, 13, 17, 103, 221, 947, 1339, 1751, 12311, 16099, 22763, 97541, 209287, 1268033, 1658197, 21556561]

約数ペア:

[(1, 21556561), (13, 1658197), (17, 1268033), (103, 209287), (221, 97541), (947, 22763), (1339, 16099), (1751, 12311)]