405690640

素因数分解:

$2^4\times 5^1\times {\mathrm{5071133}}^1$

素因数の和:5071146

約数の個数: 20

約数和(自身を含む): 943230924

約数和(自身を除く): 537540284

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 5071133, 10142266, 20284532, 25355665, 40569064, 50711330, 81138128, 101422660, 202845320, 405690640]

約数ペア:

[(1, 405690640), (2, 202845320), (4, 101422660), (5, 81138128), (8, 50711330), (10, 40569064), (16, 25355665), (20, 20284532), (40, 10142266), (80, 5071133)]