21000340865

素因数分解:

$5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{83}}^1\times {\mathrm{149}}^1\times {\mathrm{239}}^1$

素因数の和:519

約数の個数: 96

約数和(自身を含む): 31026240000

約数和(自身を除く): 10025899135

約数列:

[1, 5, 7, 29, 35, 49, 83, 145, 149, 203, 239, 245, 415, 581, 745, 1015, 1043, 1195, 1421, 1673, 2407, 2905, 4067, 4321, 5215, 6931, 7105, 7301, 8365, 11711, 12035, 12367, 16849, 19837, 20335, 21605, 30247, 34655, 35611, 36505, 48517, 58555, 61835, 84245, 86569, 99185, 117943, 138859, 151235, 178055, 211729, 242585, 249277, 339619, 358643, 432845, 575273, 589715, 605983, 694295, 972013, 1032719, 1058645, 1246385, 1698095, 1744939, 1793215, 2510501, 2876365, 2955713, 3029915, 4026911, 4860065, 5163595, 7229033, 8724695, 12552505, 14778565, 17573507, 20134555, 20689991, 28188377, 36145165, 50603231, 85715677, 87867535, 103449955, 140941885, 144829937, 253016155, 428578385, 600009739, 724149685, 3000048695, 4200068173, 21000340865]

約数ペア:

[(1, 21000340865), (5, 4200068173), (7, 3000048695), (29, 724149685), (35, 600009739), (49, 428578385), (83, 253016155), (145, 144829937), (149, 140941885), (203, 103449955), (239, 87867535), (245, 85715677), (415, 50603231), (581, 36145165), (745, 28188377), (1015, 20689991), (1043, 20134555), (1195, 17573507), (1421, 14778565), (1673, 12552505), (2407, 8724695), (2905, 7229033), (4067, 5163595), (4321, 4860065), (5215, 4026911), (6931, 3029915), (7105, 2955713), (7301, 2876365), (8365, 2510501), (11711, 1793215), (12035, 1744939), (12367, 1698095), (16849, 1246385), (19837, 1058645), (20335, 1032719), (21605, 972013), (30247, 694295), (34655, 605983), (35611, 589715), (36505, 575273), (48517, 432845), (58555, 358643), (61835, 339619), (84245, 249277), (86569, 242585), (99185, 211729), (117943, 178055), (138859, 151235)]