19728009

素因数分解:

$3^3\times 7^1\times {\mathrm{104381}}^1$

素因数の和:104397

約数の個数: 16

約数和(自身を含む): 33402240

約数和(自身を除く): 13674231

約数列:

[1, 3, 7, 9, 21, 27, 63, 189, 104381, 313143, 730667, 939429, 2192001, 2818287, 6576003, 19728009]

約数ペア:

[(1, 19728009), (3, 6576003), (7, 2818287), (9, 2192001), (21, 939429), (27, 730667), (63, 313143), (189, 104381)]