21345812

素因数分解:

$2^2\times {\mathrm{17}}^1\times {\mathrm{313909}}^1$

素因数の和:313930

約数の個数: 12

約数和(自身を含む): 39552660

約数和(自身を除く): 18206848

約数列:

[1, 2, 4, 17, 34, 68, 313909, 627818, 1255636, 5336453, 10672906, 21345812]

約数ペア:

[(1, 21345812), (2, 10672906), (4, 5336453), (17, 1255636), (34, 627818), (68, 313909)]