20991576

素因数分解:

$2^3\times 3^1\times {\mathrm{71}}^1\times {\mathrm{97}}^1\times {\mathrm{127}}^1$

素因数の和:304

約数の個数: 64

約数和(自身を含む): 54190080

約数和(自身を除く): 33198504

約数列:

[1, 2, 3, 4, 6, 8, 12, 24, 71, 97, 127, 142, 194, 213, 254, 284, 291, 381, 388, 426, 508, 568, 582, 762, 776, 852, 1016, 1164, 1524, 1704, 2328, 3048, 6887, 9017, 12319, 13774, 18034, 20661, 24638, 27051, 27548, 36068, 36957, 41322, 49276, 54102, 55096, 72136, 73914, 82644, 98552, 108204, 147828, 165288, 216408, 295656, 874649, 1749298, 2623947, 3498596, 5247894, 6997192, 10495788, 20991576]

約数ペア:

[(1, 20991576), (2, 10495788), (3, 6997192), (4, 5247894), (6, 3498596), (8, 2623947), (12, 1749298), (24, 874649), (71, 295656), (97, 216408), (127, 165288), (142, 147828), (194, 108204), (213, 98552), (254, 82644), (284, 73914), (291, 72136), (381, 55096), (388, 54102), (426, 49276), (508, 41322), (568, 36957), (582, 36068), (762, 27548), (776, 27051), (852, 24638), (1016, 20661), (1164, 18034), (1524, 13774), (1704, 12319), (2328, 9017), (3048, 6887)]