18780009

素因数分解:

$3^1\times {\mathrm{41}}^1\times {\mathrm{61}}^1\times {\mathrm{2503}}^1$

素因数の和:2608

約数の個数: 16

約数和(自身を含む): 26081664

約数和(自身を除く): 7301655

約数列:

[1, 3, 41, 61, 123, 183, 2501, 2503, 7503, 7509, 102623, 152683, 307869, 458049, 6260003, 18780009]

約数ペア:

[(1, 18780009), (3, 6260003), (41, 458049), (61, 307869), (123, 152683), (183, 102623), (2501, 7509), (2503, 7503)]