20915739

素因数分解:

$3^6\times {\mathrm{13}}^1\times {\mathrm{2207}}^1$

素因数の和:2238

約数の個数: 28

約数和(自身を含む): 33786816

約数和(自身を除く): 12871077

約数列:

[1, 3, 9, 13, 27, 39, 81, 117, 243, 351, 729, 1053, 2207, 3159, 6621, 9477, 19863, 28691, 59589, 86073, 178767, 258219, 536301, 774657, 1608903, 2323971, 6971913, 20915739]

約数ペア:

[(1, 20915739), (3, 6971913), (9, 2323971), (13, 1608903), (27, 774657), (39, 536301), (81, 258219), (117, 178767), (243, 86073), (351, 59589), (729, 28691), (1053, 19863), (2207, 9477), (3159, 6621)]