They are:
There are three factor pairs for 16:
(1, 21)
(3, 7)
1 x 16, 2 x 8, 4 x 4, 8 x 2, 16 x 1
The GCF is 2.
164,182,241,4
The GCF is 8.
1 x 61 is the only factor pair of 61.
Because 16 is a factor of 48.
1 x 16, 2 x 8, 4 x 4, 8 x 2, 16 x 1
No, 32 is a multiple of 16. 16 is a factor of 32.
The GCF is 1.
The GCF is 4.
The GCF is 8.
It is: 4
The GCF is 2.
The GCF is 8.
The GCF of 16,24,56 is 8.
The GCF is 4.
1x40, 2x20, 4x10, 5x8 are all the factor pairs of 40.