19997847

素因数分解:

$3^4\times {\mathrm{239}}^1\times {\mathrm{1033}}^1$

素因数の和:1284

約数の個数: 20

約数和(自身を含む): 30027360

約数和(自身を除く): 10029513

約数列:

[1, 3, 9, 27, 81, 239, 717, 1033, 2151, 3099, 6453, 9297, 19359, 27891, 83673, 246887, 740661, 2221983, 6665949, 19997847]

約数ペア:

[(1, 19997847), (3, 6665949), (9, 2221983), (27, 740661), (81, 246887), (239, 83673), (717, 27891), (1033, 19359), (2151, 9297), (3099, 6453)]