21309716

素因数分解:

$2^2\times {\mathrm{19}}^1\times {\mathrm{199}}^1\times {\mathrm{1409}}^1$

素因数の和:1631

約数の個数: 24

約数和(自身を含む): 39480000

約数和(自身を除く): 18170284

約数列:

[1, 2, 4, 19, 38, 76, 199, 398, 796, 1409, 2818, 3781, 5636, 7562, 15124, 26771, 53542, 107084, 280391, 560782, 1121564, 5327429, 10654858, 21309716]

約数ペア:

[(1, 21309716), (2, 10654858), (4, 5327429), (19, 1121564), (38, 560782), (76, 280391), (199, 107084), (398, 53542), (796, 26771), (1409, 15124), (2818, 7562), (3781, 5636)]