21135249

素因数分解:

$3^4\times {\mathrm{311}}^1\times {\mathrm{839}}^1$

素因数の和:1162

約数の個数: 20

約数和(自身を含む): 31711680

約数和(自身を除く): 10576431

約数列:

[1, 3, 9, 27, 81, 311, 839, 933, 2517, 2799, 7551, 8397, 22653, 25191, 67959, 260929, 782787, 2348361, 7045083, 21135249]

約数ペア:

[(1, 21135249), (3, 7045083), (9, 2348361), (27, 782787), (81, 260929), (311, 67959), (839, 25191), (933, 22653), (2517, 8397), (2799, 7551)]