Matrix of factors : maple_ifactors

### 2.6.8 Matrix of factors : `maple_ifactors`

`maple_ifactors` has an integer n (or a list of integers) as parameter.
`maple_ifactors` decomposes the integer (or the integers of the list) into prime factors, but the output follows the Maple syntax :
it is a list with +1 or -1 (for the sign) and a matrix with 2 columns and where the lines are the prime factors and their multiplicity (or a list of lists...).
Input :

`maple_ifactors(90)`

Output :

`[1,[[2,1],[3,2],[5,1]]]`

Input :

`maple_ifactor([36,52])`

Output :

`[[1,[[2,2],[3,2]]],[1,[[2,2],[13,1]]]]`