20985783

素因数分解:

$3^1\times 7^1\times {\mathrm{13}}^1\times {\mathrm{76871}}^1$

素因数の和:76894

約数の個数: 16

約数和(自身を含む): 34438656

約数和(自身を除く): 13452873

約数列:

[1, 3, 7, 13, 21, 39, 91, 273, 76871, 230613, 538097, 999323, 1614291, 2997969, 6995261, 20985783]

約数ペア:

[(1, 20985783), (3, 6995261), (7, 2997969), (13, 1614291), (21, 999323), (39, 538097), (91, 230613), (273, 76871)]