20913471

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{127}}^1$

素因数の和:265

約数の個数: 40

約数和(自身を含む): 33454080

約数和(自身を除く): 12540609

約数列:

[1, 3, 9, 19, 27, 57, 81, 107, 127, 171, 321, 381, 513, 963, 1143, 1539, 2033, 2413, 2889, 3429, 6099, 7239, 8667, 10287, 13589, 18297, 21717, 40767, 54891, 65151, 122301, 164673, 195453, 258191, 366903, 774573, 1100709, 2323719, 6971157, 20913471]

約数ペア:

[(1, 20913471), (3, 6971157), (9, 2323719), (19, 1100709), (27, 774573), (57, 366903), (81, 258191), (107, 195453), (127, 164673), (171, 122301), (321, 65151), (381, 54891), (513, 40767), (963, 21717), (1143, 18297), (1539, 13589), (2033, 10287), (2413, 8667), (2889, 7239), (3429, 6099)]