21075716

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{309937}}^1$

素因数の和:309958

約数の個数: 12

約数和(自身を含む): 39052188

約数和(自身を除く): 17976472

約数列:

[1, 2, 4, 17, 34, 68, 309937, 619874, 1239748, 5268929, 10537858, 21075716]

約数ペア:

[(1, 21075716), (2, 10537858), (4, 5268929), (17, 1239748), (34, 619874), (68, 309937)]