substringDivisibility()
should return [ 1430952867, 1460357289, 1406357289, 4130952867, 4160357289, 4106357289 ].
testString: assert.deepEqual(substringDivisibility(), [ 1430952867, 1460357289, 1406357289, 4130952867, 4160357289, 4106357289 ], 'substringDivisibility()
should return [ 1430952867, 1460357289, 1406357289, 4130952867, 4160357289, 4106357289 ].');
```