21115831

素因数分解:

${\mathrm{11}}^2\times {\mathrm{47}}^2\times {\mathrm{79}}^1$

素因数の和:195

約数の個数: 18

約数和(自身を含む): 24014480

約数和(自身を除く): 2898649

約数列:

[1, 11, 47, 79, 121, 517, 869, 2209, 3713, 5687, 9559, 24299, 40843, 174511, 267289, 449273, 1919621, 21115831]

約数ペア:

[(1, 21115831), (11, 1919621), (47, 449273), (79, 267289), (121, 174511), (517, 40843), (869, 24299), (2209, 9559), (3713, 5687)]