20717541

素因数分解:

$3^2\times {\mathrm{13}}^2\times {\mathrm{53}}^1\times {\mathrm{257}}^1$

素因数の和:342

約数の個数: 36

約数和(自身を含む): 33144228

約数和(自身を除く): 12426687

約数列:

[1, 3, 9, 13, 39, 53, 117, 159, 169, 257, 477, 507, 689, 771, 1521, 2067, 2313, 3341, 6201, 8957, 10023, 13621, 26871, 30069, 40863, 43433, 80613, 122589, 130299, 177073, 390897, 531219, 1593657, 2301949, 6905847, 20717541]

約数ペア:

[(1, 20717541), (3, 6905847), (9, 2301949), (13, 1593657), (39, 531219), (53, 390897), (117, 177073), (159, 130299), (169, 122589), (257, 80613), (477, 43433), (507, 40863), (689, 30069), (771, 26871), (1521, 13621), (2067, 10023), (2313, 8957), (3341, 6201)]