They are: 1, 2 and 4
1, 2, 4, 5, 8, 10, 16, 20, 40, 80
They are: 1, 2, 4, 8 and 16
The whole-number factors of 80 are 1, 2, 4, 5, 8, 10, 16, 20, 40, and 80.
1, 2, 4, 5, 10, 20
No
Yes 4 goes into 80.
Each of these numbers will go evenly into 80: 1, 2, 4, 5, 8, 10, 16, 20, 40, 80.
(8²)64 + (4²)16 = 80
80= 5x5x3+5
2 x 4 x 10 = 80
1 and 5.
Just 1.