21997854

素因数分解:

$2^1\times 3^2\times {\mathrm{43}}^1\times {\mathrm{97}}^1\times {\mathrm{293}}^1$

素因数の和:441

約数の個数: 48

約数和(自身を含む): 49441392

約数和(自身を除く): 27443538

約数列:

[1, 2, 3, 6, 9, 18, 43, 86, 97, 129, 194, 258, 291, 293, 387, 582, 586, 774, 873, 879, 1746, 1758, 2637, 4171, 5274, 8342, 12513, 12599, 25026, 25198, 28421, 37539, 37797, 56842, 75078, 75594, 85263, 113391, 170526, 226782, 255789, 511578, 1222103, 2444206, 3666309, 7332618, 10998927, 21997854]

約数ペア:

[(1, 21997854), (2, 10998927), (3, 7332618), (6, 3666309), (9, 2444206), (18, 1222103), (43, 511578), (86, 255789), (97, 226782), (129, 170526), (194, 113391), (258, 85263), (291, 75594), (293, 75078), (387, 56842), (582, 37797), (586, 37539), (774, 28421), (873, 25198), (879, 25026), (1746, 12599), (1758, 12513), (2637, 8342), (4171, 5274)]