Divisor 21541

To determine if any number is divisible by 21541, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 13 and 1657 - then it is divisible by 21541.

The following tests must pass:

• Test if a number is divisible by 13
• The "Zach B Test" for Divisibility by 1657

Easy!