def num_divisori(l5,k):
    l2=[]
    for x in l5:
        i=2
        while i<x:
            if x%i==0:
                l2+=[x]
                break
            i=i+1
    return num_div2(l2,k)

def num_div2(l2,k):
    l3=[]
    l4=[]
    for x in l2:
        i=2
        while i<x:
            if x%i==0:
                l3+=[i]
            i=i+1
        if len(l3)==k:
            l4+=[x]
        l3=[]
    return l4