20888928009

素因数分解:

$3^2\times {\mathrm{41}}^2\times {\mathrm{1380721}}^1$

素因数の和:1380809

約数の個数: 18

約数和(自身を含む): 30926792078

約数和(自身を除く): 10037864069

約数列:

[1, 3, 9, 41, 123, 369, 1681, 5043, 15129, 1380721, 4142163, 12426489, 56609561, 169828683, 509486049, 2320992001, 6962976003, 20888928009]

約数ペア:

[(1, 20888928009), (3, 6962976003), (9, 2320992001), (41, 509486049), (123, 169828683), (369, 56609561), (1681, 12426489), (5043, 4142163), (15129, 1380721)]