Sum of divisors - script

This script calculates the sum of divisors of a given number.
It also gives the prime factor decomposition and the Euler totient φ(n).
Proofs et formulas.
Number :  
Arithmétic expressions using ( ) * + - / are allowed
(value in range 1 ... )
Large values of n may result into a warning for long calculation time.
The used method for prime decomposition is very "basic" and is not suitable for large numbers, This script is not suitable for numbers with large prime factors.



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