21000871384

素因数分解:

$2^3\times {\mathrm{31}}^2\times {\mathrm{127}}^1\times {\mathrm{137}}^1\times {\mathrm{157}}^1$

素因数の和:489

約数の個数: 96

約数和(自身を含む): 41570634240

約数和(自身を除く): 20569762856

約数列:

[1, 2, 4, 8, 31, 62, 124, 127, 137, 157, 248, 254, 274, 314, 508, 548, 628, 961, 1016, 1096, 1256, 1922, 3844, 3937, 4247, 4867, 7688, 7874, 8494, 9734, 15748, 16988, 17399, 19468, 19939, 21509, 31496, 33976, 34798, 38936, 39878, 43018, 69596, 79756, 86036, 122047, 131657, 139192, 150877, 159512, 172072, 244094, 263314, 301754, 488188, 526628, 539369, 603508, 618109, 666779, 976376, 1053256, 1078738, 1207016, 1236218, 1333558, 2157476, 2472436, 2667116, 2731643, 4314952, 4944872, 5334232, 5463286, 10926572, 16720439, 19161379, 20670149, 21853144, 33440878, 38322758, 41340298, 66881756, 76645516, 82680596, 84680933, 133763512, 153291032, 165361192, 169361866, 338723732, 677447464, 2625108923, 5250217846, 10500435692, 21000871384]

約数ペア:

[(1, 21000871384), (2, 10500435692), (4, 5250217846), (8, 2625108923), (31, 677447464), (62, 338723732), (124, 169361866), (127, 165361192), (137, 153291032), (157, 133763512), (248, 84680933), (254, 82680596), (274, 76645516), (314, 66881756), (508, 41340298), (548, 38322758), (628, 33440878), (961, 21853144), (1016, 20670149), (1096, 19161379), (1256, 16720439), (1922, 10926572), (3844, 5463286), (3937, 5334232), (4247, 4944872), (4867, 4314952), (7688, 2731643), (7874, 2667116), (8494, 2472436), (9734, 2157476), (15748, 1333558), (16988, 1236218), (17399, 1207016), (19468, 1078738), (19939, 1053256), (21509, 976376), (31496, 666779), (33976, 618109), (34798, 603508), (38936, 539369), (39878, 526628), (43018, 488188), (69596, 301754), (79756, 263314), (86036, 244094), (122047, 172072), (131657, 159512), (139192, 150877)]