21687105

素因数分解:

$3^1\times 5^1\times {\mathrm{11}}^1\times {\mathrm{131437}}^1$

素因数の和:131456

約数の個数: 16

約数和(自身を含む): 37854144

約数和(自身を除く): 16167039

約数列:

[1, 3, 5, 11, 15, 33, 55, 165, 131437, 394311, 657185, 1445807, 1971555, 4337421, 7229035, 21687105]

約数ペア:

[(1, 21687105), (3, 7229035), (5, 4337421), (11, 1971555), (15, 1445807), (33, 657185), (55, 394311), (165, 131437)]