18720676

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{173}}^1\times {\mathrm{2081}}^1$

素因数の和:2271

約数の個数: 24

約数和(自身を含む): 35502264

約数和(自身を除く): 16781588

約数列:

[1, 2, 4, 13, 26, 52, 173, 346, 692, 2081, 2249, 4162, 4498, 8324, 8996, 27053, 54106, 108212, 360013, 720026, 1440052, 4680169, 9360338, 18720676]

約数ペア:

[(1, 18720676), (2, 9360338), (4, 4680169), (13, 1440052), (26, 720026), (52, 360013), (173, 108212), (346, 54106), (692, 27053), (2081, 8996), (2249, 8324), (4162, 4498)]