20925891

素因数分解:

$3^3\times 7^2\times {\mathrm{15817}}^1$

素因数の和:15840

約数の個数: 24

約数和(自身を含む): 36065040

約数和(自身を除く): 15139149

約数列:

[1, 3, 7, 9, 21, 27, 49, 63, 147, 189, 441, 1323, 15817, 47451, 110719, 142353, 332157, 427059, 775033, 996471, 2325099, 2989413, 6975297, 20925891]

約数ペア:

[(1, 20925891), (3, 6975297), (7, 2989413), (9, 2325099), (21, 996471), (27, 775033), (49, 427059), (63, 332157), (147, 142353), (189, 110719), (441, 47451), (1323, 15817)]