19809981

素因数分解:

$3^3\times {\mathrm{17}}^1\times {\mathrm{43159}}^1$

素因数の和:43185

約数の個数: 16

約数和(自身を含む): 31075200

約数和(自身を除く): 11265219

約数列:

[1, 3, 9, 17, 27, 51, 153, 459, 43159, 129477, 388431, 733703, 1165293, 2201109, 6603327, 19809981]

約数ペア:

[(1, 19809981), (3, 6603327), (9, 2201109), (17, 1165293), (27, 733703), (51, 388431), (153, 129477), (459, 43159)]