21258105

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{128837}}^1$

素因数の和:128856

約数の個数: 16

約数和(自身を含む): 37105344

約数和(自身を除く): 15847239

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 128837, 386511, 644185, 1417207, 1932555, 4251621, 7086035, 21258105]

約数ペア:

[(1, 21258105), (3, 7086035), (5, 4251621), (11, 1932555), (15, 1417207), (33, 644185), (55, 386511), (165, 128837)]