18981999

素因数分解:

$3^3\times {\mathrm{37}}^1\times {\mathrm{19001}}^1$

素因数の和:19047

約数の個数: 16

約数和(自身を含む): 28883040

約数和(自身を除く): 9901041

約数列:

[1, 3, 9, 27, 37, 111, 333, 999, 19001, 57003, 171009, 513027, 703037, 2109111, 6327333, 18981999]

約数ペア:

[(1, 18981999), (3, 6327333), (9, 2109111), (27, 703037), (37, 513027), (111, 171009), (333, 57003), (999, 19001)]