Divisor 21797

To determine if any number is divisible by 21797, you must apply 2 tests successively. If all of them 'pass' - that is, if your number is divisible by 71 and 307 - then it is divisible by 21797.

The following tests must pass:

• Test if a number is divisible by 71
• Test if a number is divisible by 307

Easy!