18821781

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{127}}^1\times {\mathrm{499}}^1$

素因数の和:646

約数の個数: 32

約数和(自身を含む): 30720000

約数和(自身を除く): 11898219

約数列:

[1, 3, 9, 11, 27, 33, 99, 127, 297, 381, 499, 1143, 1397, 1497, 3429, 4191, 4491, 5489, 12573, 13473, 16467, 37719, 49401, 63373, 148203, 190119, 570357, 697103, 1711071, 2091309, 6273927, 18821781]

約数ペア:

[(1, 18821781), (3, 6273927), (9, 2091309), (11, 1711071), (27, 697103), (33, 570357), (99, 190119), (127, 148203), (297, 63373), (381, 49401), (499, 37719), (1143, 16467), (1397, 13473), (1497, 12573), (3429, 5489), (4191, 4491)]