20818265

素因数分解:

$5^1\times {\mathrm{13}}^2\times {\mathrm{71}}^1\times {\mathrm{347}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 27511488

約数和(自身を除く): 6693223

約数列:

[1, 5, 13, 65, 71, 169, 347, 355, 845, 923, 1735, 4511, 4615, 11999, 22555, 24637, 58643, 59995, 123185, 293215, 320281, 1601405, 4163653, 20818265]

約数ペア:

[(1, 20818265), (5, 4163653), (13, 1601405), (65, 320281), (71, 293215), (169, 123185), (347, 59995), (355, 58643), (845, 24637), (923, 22555), (1735, 11999), (4511, 4615)]