18017901

素因数分解:

$3^2\times {\mathrm{11}}^1\times {\mathrm{23}}^1\times {\mathrm{41}}^1\times {\mathrm{193}}^1$

素因数の和:274

約数の個数: 48

約数和(自身を含む): 30506112

約数和(自身を除く): 12488211

約数列:

[1, 3, 9, 11, 23, 33, 41, 69, 99, 123, 193, 207, 253, 369, 451, 579, 759, 943, 1353, 1737, 2123, 2277, 2829, 4059, 4439, 6369, 7913, 8487, 10373, 13317, 19107, 23739, 31119, 39951, 48829, 71217, 87043, 93357, 146487, 181999, 261129, 439461, 545997, 783387, 1637991, 2001989, 6005967, 18017901]

約数ペア:

[(1, 18017901), (3, 6005967), (9, 2001989), (11, 1637991), (23, 783387), (33, 545997), (41, 439461), (69, 261129), (99, 181999), (123, 146487), (193, 93357), (207, 87043), (253, 71217), (369, 48829), (451, 39951), (579, 31119), (759, 23739), (943, 19107), (1353, 13317), (1737, 10373), (2123, 8487), (2277, 7913), (2829, 6369), (4059, 4439)]