21000618140

素因数分解:

$2^2\times 5^1\times {\mathrm{1050030907}}^1$

素因数の和:1050030916

約数の個数: 12

約数和(自身を含む): 44101298136

約数和(自身を除く): 23100679996

約数列:

[1, 2, 4, 5, 10, 20, 1050030907, 2100061814, 4200123628, 5250154535, 10500309070, 21000618140]

約数ペア:

[(1, 21000618140), (2, 10500309070), (4, 5250154535), (5, 4200123628), (10, 2100061814), (20, 1050030907)]