12991509

素因数分解:

$3^6\times {\mathrm{71}}^1\times {\mathrm{251}}^1$

素因数の和:340

約数の個数: 28

約数和(自身を含む): 19831392

約数和(自身を除く): 6839883

約数列:

[1, 3, 9, 27, 71, 81, 213, 243, 251, 639, 729, 753, 1917, 2259, 5751, 6777, 17253, 17821, 20331, 51759, 53463, 60993, 160389, 182979, 481167, 1443501, 4330503, 12991509]

約数ペア:

[(1, 12991509), (3, 4330503), (9, 1443501), (27, 481167), (71, 182979), (81, 160389), (213, 60993), (243, 53463), (251, 51759), (639, 20331), (729, 17821), (753, 17253), (1917, 6777), (2259, 5751)]