619 is already prime. It doesn't need a tree.
IT IS PRIME there is no factor tree
factor tree of 216
Factor tree of 204
The factor tree of 50:5025,25,5,25025,25,5,2
21
1238 is a composite number because it has factors other than 1 and itself. It is not a prime number.The 4 factors of 1238 are 1, 2, 619, and 1238.The factor pairs of 1238 are 1 x 1238 and 2 x 619.The proper factors of 1238 are 1, 2, and 619 or,if the definition you are using excludes 1, they are 2 and 619.The prime factors of 1238 are 2 and 619.The 2 distinct prime factors (listing each prime factor only once) of 1238 are 2 and 619.The prime factorization of 1238 is 2 x 619.NOTE: There cannot be common factors, a greatest common factor, or a least common multiple because "common" refers to factors or multiples that two or more numbers have in common.
83 is prime. No tree.
The prime factor tree of 280 is:140,270,2,235,2,2,27,5,2,2,2
Factor Tree of 20: ........20 ......../ \ .......4 5 ....../ \ .....2 2
A tree.
The factor tree for 148: 148 74,2 37,2,2
311 is prime. It doesn't need a factor tree.