56640321

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{137}}^1\times {\mathrm{647}}^1$

素因数の和:861

約数の個数: 24

約数和(自身を含む): 83700864

約数和(自身を除く): 27060543

約数列:

[1, 3, 9, 71, 137, 213, 411, 639, 647, 1233, 1941, 5823, 9727, 29181, 45937, 87543, 88639, 137811, 265917, 413433, 797751, 6293369, 18880107, 56640321]

約数ペア:

[(1, 56640321), (3, 18880107), (9, 6293369), (71, 797751), (137, 413433), (213, 265917), (411, 137811), (639, 88639), (647, 87543), (1233, 45937), (1941, 29181), (5823, 9727)]