Breaking apart a number is generally a process that rewrites a number as a sum (or, perhaps, product) of numbers that may be easier to work with (more useful) for one reason or another.

Whenever you do a division operation, you get two results:

a quotient and a remainder. Using division to break apart a number would involve choosing a suitable divisor so that you get a useful quotient and/or a useful remainder.

Your question is quite general, and is unusual in that "by division" is not usually associated with "break apart". Apparently, you have a specific problem or procedure in mind. More information about what you are trying to do or solve would be useful.

Whenever you do a division operation, you get two results:

a quotient and a remainder. Using division to break apart a number would involve choosing a suitable divisor so that you get a useful quotient and/or a useful remainder.

Your question is quite general, and is unusual in that "by division" is not usually associated with "break apart". Apparently, you have a specific problem or procedure in mind. More information about what you are trying to do or solve would be useful.