18291357

素因数分解:

$3^2\times 7^2\times {\mathrm{19}}^1\times {\mathrm{37}}^1\times {\mathrm{59}}^1$

素因数の和:135

約数の個数: 72

約数和(自身を含む): 33789600

約数和(自身を除く): 15498243

約数列:

[1, 3, 7, 9, 19, 21, 37, 49, 57, 59, 63, 111, 133, 147, 171, 177, 259, 333, 399, 413, 441, 531, 703, 777, 931, 1121, 1197, 1239, 1813, 2109, 2183, 2331, 2793, 2891, 3363, 3717, 4921, 5439, 6327, 6549, 7847, 8379, 8673, 10089, 14763, 15281, 16317, 19647, 23541, 26019, 34447, 41477, 44289, 45843, 54929, 70623, 103341, 106967, 124431, 137529, 164787, 290339, 310023, 320901, 373293, 494361, 871017, 962703, 2032373, 2613051, 6097119, 18291357]

約数ペア:

[(1, 18291357), (3, 6097119), (7, 2613051), (9, 2032373), (19, 962703), (21, 871017), (37, 494361), (49, 373293), (57, 320901), (59, 310023), (63, 290339), (111, 164787), (133, 137529), (147, 124431), (171, 106967), (177, 103341), (259, 70623), (333, 54929), (399, 45843), (413, 44289), (441, 41477), (531, 34447), (703, 26019), (777, 23541), (931, 19647), (1121, 16317), (1197, 15281), (1239, 14763), (1813, 10089), (2109, 8673), (2183, 8379), (2331, 7847), (2793, 6549), (2891, 6327), (3363, 5439), (3717, 4921)]