The four common factors are: 1, 3, 17, 51.
Four factors in common.
Five common factors.
None recorded.
8 common factors.
None. Common factors refer to factors that are common to two or more numbers. You have only one.
Any of 39's factors can be common.
Three factors in common.
Four common factors.
None recorded.
Two. The common factors are: 1, 2
Common factors of 28 and 34 are: 1 and 2.
7 has two factors, one and itself. For them to be common, they need to be compared to another set of factors.