218781

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{73}}^1$

素因数の和:122

約数の個数: 20

約数和(自身を含む): 340252

約数和(自身を除く): 121471

約数列:

[1, 3, 9, 27, 37, 73, 81, 111, 219, 333, 657, 999, 1971, 2701, 2997, 5913, 8103, 24309, 72927, 218781]

約数ペア:

[(1, 218781), (3, 72927), (9, 24309), (27, 8103), (37, 5913), (73, 2997), (81, 2701), (111, 1971), (219, 999), (333, 657)]