21493816

素因数分解:

$2^3\times {\mathrm{331}}^1\times {\mathrm{8117}}^1$

素因数の和:8454

約数の個数: 16

約数和(自身を含む): 40427640

約数和(自身を除く): 18933824

約数列:

[1, 2, 4, 8, 331, 662, 1324, 2648, 8117, 16234, 32468, 64936, 2686727, 5373454, 10746908, 21493816]

約数ペア:

[(1, 21493816), (2, 10746908), (4, 5373454), (8, 2686727), (331, 64936), (662, 32468), (1324, 16234), (2648, 8117)]