Geodesic
What positive integers n can be presented in the form n = (x + y + z)(1/x + 1/y + 1/z)?
Annales mathematicae et informaticae, Volume 54 (2021), pp. 141-146

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Nguyen Xuan Tho. What positive integers n can be presented in the form n = (x + y + z)(1/x + 1/y + 1/z)?. Annales mathematicae et informaticae, Volume 54 (2021), pp. 141-146. doi: 10.33039/ami.2021.04.005
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     author = {Nguyen Xuan Tho},
     title = {What positive integers n can be presented in the form n = (x + y + z)(1/x + 1/y + 1/z)?},
     journal = {Annales mathematicae et informaticae},
     pages = {141--146},
     year = {2021},
     volume = {54},
     doi = {10.33039/ami.2021.04.005},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.33039/ami.2021.04.005/}
}
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