1 and 31
31 is prime. No tree.
155 5, 31
124 2 * 62 2 * 2 * 31
4342, 2172, 7, 31Note: 31 is a prime number
310 310=31x5x2 31 10 2 5
740 /\ 10 74 /\ /\ 5 5 2 31
Since 31 is a prime number, you would simply make two branches: one for 1, and one for 31.
248 2, 124 2, 2, 62 2, 2, 2, 31
279 93 x 3 31 x 3 x 3
The factor pair for 31 is 1*31. Since 31 is prime, it has only one factor pair.
No, 8 is not a factor of 31.
IT IS PRIME there is no factor tree