19721785

素因数分解:

$5^1\times {\mathrm{17}}^1\times {\mathrm{67}}^1\times {\mathrm{3463}}^1$

素因数の和:3552

約数の個数: 16

約数和(自身を含む): 25439616

約数和(自身を除く): 5717831

約数列:

[1, 5, 17, 67, 85, 335, 1139, 3463, 5695, 17315, 58871, 232021, 294355, 1160105, 3944357, 19721785]

約数ペア:

[(1, 19721785), (5, 3944357), (17, 1160105), (67, 294355), (85, 232021), (335, 58871), (1139, 17315), (3463, 5695)]