21795565

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{20857}}^1$

素因数の和:20892

約数の個数: 16

約数和(自身を含む): 30035520

約数和(自身を除く): 8239955

約数列:

[1, 5, 11, 19, 55, 95, 209, 1045, 20857, 104285, 229427, 396283, 1147135, 1981415, 4359113, 21795565]

約数ペア:

[(1, 21795565), (5, 4359113), (11, 1981415), (19, 1147135), (55, 396283), (95, 229427), (209, 104285), (1045, 20857)]