20157795

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{83}}^1\times {\mathrm{257}}^1$

素因数の和:361

約数の個数: 64

約数和(自身を含む): 41610240

約数和(自身を除く): 21452445

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 83, 105, 135, 189, 249, 257, 315, 415, 581, 747, 771, 945, 1245, 1285, 1743, 1799, 2241, 2313, 2905, 3735, 3855, 5229, 5397, 6939, 8715, 8995, 11205, 11565, 15687, 16191, 21331, 26145, 26985, 34695, 48573, 63993, 78435, 80955, 106655, 149317, 191979, 242865, 319965, 447951, 575937, 746585, 959895, 1343853, 2239755, 2879685, 4031559, 6719265, 20157795]

約数ペア:

[(1, 20157795), (3, 6719265), (5, 4031559), (7, 2879685), (9, 2239755), (15, 1343853), (21, 959895), (27, 746585), (35, 575937), (45, 447951), (63, 319965), (83, 242865), (105, 191979), (135, 149317), (189, 106655), (249, 80955), (257, 78435), (315, 63993), (415, 48573), (581, 34695), (747, 26985), (771, 26145), (945, 21331), (1245, 16191), (1285, 15687), (1743, 11565), (1799, 11205), (2241, 8995), (2313, 8715), (2905, 6939), (3735, 5397), (3855, 5229)]