21287994

素因数分解:

$2^1\times 3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{127}}^1\times {\mathrm{307}}^1$

素因数の和:459

約数の個数: 64

約数和(自身を含む): 52985856

約数和(自身を除く): 31697862

約数列:

[1, 2, 3, 6, 7, 13, 14, 21, 26, 39, 42, 78, 91, 127, 182, 254, 273, 307, 381, 546, 614, 762, 889, 921, 1651, 1778, 1842, 2149, 2667, 3302, 3991, 4298, 4953, 5334, 6447, 7982, 9906, 11557, 11973, 12894, 23114, 23946, 27937, 34671, 38989, 55874, 69342, 77978, 83811, 116967, 167622, 233934, 272923, 506857, 545846, 818769, 1013714, 1520571, 1637538, 3041142, 3547999, 7095998, 10643997, 21287994]

約数ペア:

[(1, 21287994), (2, 10643997), (3, 7095998), (6, 3547999), (7, 3041142), (13, 1637538), (14, 1520571), (21, 1013714), (26, 818769), (39, 545846), (42, 506857), (78, 272923), (91, 233934), (127, 167622), (182, 116967), (254, 83811), (273, 77978), (307, 69342), (381, 55874), (546, 38989), (614, 34671), (762, 27937), (889, 23946), (921, 23114), (1651, 12894), (1778, 11973), (1842, 11557), (2149, 9906), (2667, 7982), (3302, 6447), (3991, 5334), (4298, 4953)]