Seven factors.
8 factors.
16 factors.
7
Two factors.
common factors means you have more than one number.
30 has 7 factors
It has 4 factors (1,86 2,43) It has 4 factors (1,86 2,43)
7 has two factors, one and itself. For them to be common, they need to be compared to another set of factors.
Two: 1 and 7.
Ten.
Ten.