21017997

素因数分解:

$3^2\times 7^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{2333}}^1$

素因数の和:2370

約数の個数: 48

約数和(自身を含む): 40779648

約数和(自身を除く): 19761651

約数列:

[1, 3, 7, 9, 11, 13, 21, 33, 39, 63, 77, 91, 99, 117, 143, 231, 273, 429, 693, 819, 1001, 1287, 2333, 3003, 6999, 9009, 16331, 20997, 25663, 30329, 48993, 76989, 90987, 146979, 179641, 212303, 230967, 272961, 333619, 538923, 636909, 1000857, 1616769, 1910727, 2335333, 3002571, 7005999, 21017997]

約数ペア:

[(1, 21017997), (3, 7005999), (7, 3002571), (9, 2335333), (11, 1910727), (13, 1616769), (21, 1000857), (33, 636909), (39, 538923), (63, 333619), (77, 272961), (91, 230967), (99, 212303), (117, 179641), (143, 146979), (231, 90987), (273, 76989), (429, 48993), (693, 30329), (819, 25663), (1001, 20997), (1287, 16331), (2333, 9009), (3003, 6999)]