728721

素因数分解:

$3^2\times 7^1\times {\mathrm{43}}^1\times {\mathrm{269}}^1$

素因数の和:325

約数の個数: 24

約数和(自身を含む): 1235520

約数和(自身を除く): 506799

約数列:

[1, 3, 7, 9, 21, 43, 63, 129, 269, 301, 387, 807, 903, 1883, 2421, 2709, 5649, 11567, 16947, 34701, 80969, 104103, 242907, 728721]

約数ペア:

[(1, 728721), (3, 242907), (7, 104103), (9, 80969), (21, 34701), (43, 16947), (63, 11567), (129, 5649), (269, 2709), (301, 2421), (387, 1883), (807, 903)]