1 and 567 are a factor pair of 567 since 1 x 567= 567
3 and 189 are a factor pair of 567 since 3 x 189= 567
7 and 81 are a factor pair of 567 since 7 x 81= 567
9 and 63 are a factor pair of 567 since 9 x 63= 567
21 and 27 are a factor pair of 567 since 21 x 27= 567