1 and 31
Factor tree of 4123 .......... 4123 ............/ \ .......133 *31 ..... ../ \ ......7 *19
155 5, 31
155 /\ 5 31
It is simply 1 and 31 because 31 is a prime number
124 2 * 62 2 * 2 * 31
310 310=31x5x2 31 10 2 5
740 /\ 10 74 /\ /\ 5 5 2 31
4342, 2172, 7, 31Note: 31 is a prime number
622, 31Note: 31 is a prime number 62 2,31
Since 31 is a prime number, you would simply make two branches: one for 1, and one for 31.
Simple. the only two factors for thirty one are itself and one because 31 is a prime number.