21289331816

素因数分解:

$2^3\times {\mathrm{9551}}^1\times {\mathrm{278627}}^1$

素因数の和:288184

約数の個数: 16

約数和(自身を含む): 39921819840

約数和(自身を除く): 18632488024

約数列:

[1, 2, 4, 8, 9551, 19102, 38204, 76408, 278627, 557254, 1114508, 2229016, 2661166477, 5322332954, 10644665908, 21289331816]

約数ペア:

[(1, 21289331816), (2, 10644665908), (4, 5322332954), (8, 2661166477), (9551, 2229016), (19102, 1114508), (38204, 557254), (76408, 278627)]