21278727

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{41479}}^1$

素因数の和:41507

約数の個数: 16

約数和(自身を含む): 33184000

約数和(自身を除く): 11905273

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 41479, 124437, 373311, 788101, 1119933, 2364303, 7092909, 21278727]

約数ペア:

[(1, 21278727), (3, 7092909), (9, 2364303), (19, 1119933), (27, 788101), (57, 373311), (171, 124437), (513, 41479)]