Divisor 19601

To determine if any number is divisible by 19601, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 17 and 1153 - then it is divisible by 19601.

The following tests must pass:

• Test if a number is divisible by 17
• The "Guillaume Lederrey Test" for Divisibility by 1153

Easy!