Solution

36729

First name
Arthur
School
YCIS
Country
Age
11

The problem is easy, you only have to find the greatest common facter (GCF) for the four numbers that came out at the end. For example:

56: 1,2,4,7,8,9,28,56
24: 1,2,3,4,6,8,12,24
112: 1,2,4,8,14,28,56,112
216: 1,2,4,8,12,18,27,54,108,216

The greatest common factor is 8