Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
1, 17, 41, 697
1, 2, 17, 34
1, 13, 17 and 221.
These are all the whole numbers that go into 527 evenly: 1, 17, 31, 527.
1 and 17 will go into both numbers evenly leaving no remainderd
The numbers that go into 21 evenly are 1, 3, 7, 21.
1, 2, 17, 34.
1, 17, 41, 697
1, 2, 17, 34
1, 13, 17 and 221.
These are all the whole numbers that go into 527 evenly: 1, 17, 31, 527.
1 and 17 will go into both numbers evenly leaving no remainderd
All these go into 1,071 evenly: 1, 3, 7, 9, 17, 21, 51, 63, 119, 153, 357, 1071.
none evenly because it is a prime number.
1, 13, 17, 221
All these go into 629 evenly: 1, 17, 37, 629.
1, 3, 7, 9, 21, 63.