Prime factors

Syntax: v = PFACTORS(n)

The function PFACTORS(n) returns a vector containing the prime factors of the scalar value n.

This function can be useful in determining a good length for the input vector for the Fast Fourier transform function FFT.

Example

If you enter X=PFACTORS(420) then X will contain [2;2;3;5;7].

  Legendre functions and polynomials
  Poisson-Charlier polynomial