21256868

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{312601}}^1$

素因数の和:312622

約数の個数: 12

約数和(自身を含む): 39387852

約数和(自身を除く): 18130984

約数列:

[1, 2, 4, 17, 34, 68, 312601, 625202, 1250404, 5314217, 10628434, 21256868]

約数ペア:

[(1, 21256868), (2, 10628434), (4, 5314217), (17, 1250404), (34, 625202), (68, 312601)]