21309585

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{107}}^1$

素因数の和:214

約数の個数: 64

約数和(自身を含む): 40310784

約数和(自身を除く): 19001199

約数列:

[1, 3, 5, 11, 15, 17, 33, 51, 55, 71, 85, 107, 165, 187, 213, 255, 321, 355, 535, 561, 781, 935, 1065, 1177, 1207, 1605, 1819, 2343, 2805, 3531, 3621, 3905, 5457, 5885, 6035, 7597, 9095, 11715, 13277, 17655, 18105, 20009, 22791, 27285, 37985, 39831, 60027, 66385, 83567, 100045, 113955, 129149, 199155, 250701, 300135, 387447, 417835, 645745, 1253505, 1420639, 1937235, 4261917, 7103195, 21309585]

約数ペア:

[(1, 21309585), (3, 7103195), (5, 4261917), (11, 1937235), (15, 1420639), (17, 1253505), (33, 645745), (51, 417835), (55, 387447), (71, 300135), (85, 250701), (107, 199155), (165, 129149), (187, 113955), (213, 100045), (255, 83567), (321, 66385), (355, 60027), (535, 39831), (561, 37985), (781, 27285), (935, 22791), (1065, 20009), (1177, 18105), (1207, 17655), (1605, 13277), (1819, 11715), (2343, 9095), (2805, 7597), (3531, 6035), (3621, 5885), (3905, 5457)]