Find all the prime factors of 1729 and arrange them in ascending order. Now state the relation, if any; between two consecutive prime factors.

Solution: $1729=7\times 13\times 19$
So, $7,13\text{and}19$ are the required prime factors of $1729.$
Their ascending order will be $7,13,19$.
The relation between these prime factors is the difference between consecutive prime factors is $6$.