21071721

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{37561}}^1$

素因数の和:37592

約数の個数: 16

約数和(自身を含む): 32453568

約数和(自身を除く): 11381847

約数列:

[1, 3, 11, 17, 33, 51, 187, 561, 37561, 112683, 413171, 638537, 1239513, 1915611, 7023907, 21071721]

約数ペア:

[(1, 21071721), (3, 7023907), (11, 1915611), (17, 1239513), (33, 638537), (51, 413171), (187, 112683), (561, 37561)]