9900405

素因数分解:

$3^2\times 5^1\times {\mathrm{220009}}^1$

素因数の和:220020

約数の個数: 12

約数和(自身を含む): 17160780

約数和(自身を除く): 7260375

約数列:

[1, 3, 5, 9, 15, 45, 220009, 660027, 1100045, 1980081, 3300135, 9900405]

約数ペア:

[(1, 9900405), (3, 3300135), (5, 1980081), (9, 1100045), (15, 660027), (45, 220009)]