212787

素因数分解:

$3^4\times {\mathrm{37}}^1\times {\mathrm{71}}^1$

素因数の和:120

約数の個数: 20

約数和(自身を含む): 331056

約数和(自身を除く): 118269

約数列:

[1, 3, 9, 27, 37, 71, 81, 111, 213, 333, 639, 999, 1917, 2627, 2997, 5751, 7881, 23643, 70929, 212787]

約数ペア:

[(1, 212787), (3, 70929), (9, 23643), (27, 7881), (37, 5751), (71, 2997), (81, 2627), (111, 1917), (213, 999), (333, 639)]