21406383

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{149}}^1\times {\mathrm{313}}^1$

素因数の和:488

約数の個数: 32

約数和(自身を含む): 33912000

約数和(自身を除く): 12505617

約数列:

[1, 3, 9, 17, 27, 51, 149, 153, 313, 447, 459, 939, 1341, 2533, 2817, 4023, 5321, 7599, 8451, 15963, 22797, 46637, 47889, 68391, 139911, 143667, 419733, 792829, 1259199, 2378487, 7135461, 21406383]

約数ペア:

[(1, 21406383), (3, 7135461), (9, 2378487), (17, 1259199), (27, 792829), (51, 419733), (149, 143667), (153, 139911), (313, 68391), (447, 47889), (459, 46637), (939, 22797), (1341, 15963), (2533, 8451), (2817, 7599), (4023, 5321)]