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Question Number 174939 by BaliramKumar last updated on 14/Aug/22

$$\mathrm{sum}\mathrm{of}\mathrm{the}\mathrm{all}\mathrm{proper}\mathrm{factors}\mathrm{of}360?$$

Answered by JDamian last updated on 14/Aug/22

$$360=2^3\times 3^2\times 5$$$$\frac{2^{3+1}-1}{2-1}\times \frac{3^{2+1}-1}{3-1}\times \frac{5^{1+1}-1}{5-1}-360$$$$15\times 13\times 6-360=810$$

Commented by peter frank last updated on 14/Aug/22

$$\mathrm{thanks}$$

Commented by BaliramKumar last updated on 15/Aug/22

$$is1properfactorof360?$$

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