19988127

素因数分解:

$3^4\times {\mathrm{23}}^1\times {\mathrm{10729}}^1$

素因数の和:10764

約数の個数: 20

約数和(自身を含む): 31159920

約数和(自身を除く): 11171793

約数列:

[1, 3, 9, 23, 27, 69, 81, 207, 621, 1863, 10729, 32187, 96561, 246767, 289683, 740301, 869049, 2220903, 6662709, 19988127]

約数ペア:

[(1, 19988127), (3, 6662709), (9, 2220903), (23, 869049), (27, 740301), (69, 289683), (81, 246767), (207, 96561), (621, 32187), (1863, 10729)]