Only 1.
These whole numbers go evenly into 64: 1, 2, 4, 8, 16, 32, 64.
1, 3, 13, 39.
1, 2, 4.
Only the number one.
1 and 3 will go into both numbers evenly
2, 4, and 8 will evenly divide into both.
1, 2, 4 and 8 will go into both numbers evenly with no remainders
1, 2, 3, 6, 13, 26, 39, 78.
1, 2, 4, 8, 16, 32, 64, 128, 256.
It does not go evenly.
Not evenly.
Factors of 39: 1, 3, 13, 39 Factors of 26: 1, 2, 13, 26 Common factors: 1, 13.