20994009

素因数分解:

$3^1\times {\mathrm{23}}^1\times {\mathrm{41}}^2\times {\mathrm{181}}^1$

素因数の和:289

約数の個数: 24

約数和(自身を含む): 30104256

約数和(自身を除く): 9110247

約数列:

[1, 3, 23, 41, 69, 123, 181, 543, 943, 1681, 2829, 4163, 5043, 7421, 12489, 22263, 38663, 115989, 170683, 304261, 512049, 912783, 6998003, 20994009]

約数ペア:

[(1, 20994009), (3, 6998003), (23, 912783), (41, 512049), (69, 304261), (123, 170683), (181, 115989), (543, 38663), (943, 22263), (1681, 12489), (2829, 7421), (4163, 5043)]