Divisor 19729

To determine if any number is divisible by 19729, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 109 and 181 - then it is divisible by 19729.

The following tests must pass:

• Test if a number is divisible by 109
• Test if a number is divisible by 181

Easy!