20997027849

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{137}}^1\times {\mathrm{311}}^1\times {\mathrm{757}}^1$

素因数の和:1246

約数の個数: 64

約数和(自身を含む): 33419722752

約数和(自身を除く): 12422694903

約数列:

[1, 3, 7, 21, 31, 93, 137, 217, 311, 411, 651, 757, 933, 959, 2177, 2271, 2877, 4247, 5299, 6531, 9641, 12741, 15897, 23467, 28923, 29729, 42607, 67487, 70401, 89187, 103709, 127821, 164269, 202461, 235427, 298249, 311127, 492807, 706281, 725963, 894747, 1320817, 1647989, 2177889, 3214979, 3962451, 4943967, 7298237, 9245719, 9644937, 21894711, 22504853, 27737157, 32253499, 51087659, 67514559, 96760497, 153262977, 225774493, 677323479, 999858469, 2999575407, 6999009283, 20997027849]

約数ペア:

[(1, 20997027849), (3, 6999009283), (7, 2999575407), (21, 999858469), (31, 677323479), (93, 225774493), (137, 153262977), (217, 96760497), (311, 67514559), (411, 51087659), (651, 32253499), (757, 27737157), (933, 22504853), (959, 21894711), (2177, 9644937), (2271, 9245719), (2877, 7298237), (4247, 4943967), (5299, 3962451), (6531, 3214979), (9641, 2177889), (12741, 1647989), (15897, 1320817), (23467, 894747), (28923, 725963), (29729, 706281), (42607, 492807), (67487, 311127), (70401, 298249), (89187, 235427), (103709, 202461), (127821, 164269)]