Question

List all the common factors of 30 and 40

Answer 1

5 and a lot of other numbers that I can't list because my phone is cracked

Answer 2

Common factors of 30: −30,−15,−10,−6,−5,−3,−2,−1,1,2,3,5,6,10,15,30

Common factors of 40: −40,−20,−10,−8,−5,−4,−2,−1,1,2,4,5,8,10,20,40