1 and 3 both can.
1 and 3
21 can be divided evenly by: 1 3 7 and 21.
63 is divided evenly by these numbers: 1, 3, 7, 9, 21, 63.
67 is a prime number, but 21 isn't. A prime number can only be evenly divided by '1' and itself. 21 can be evenly divided by 1, 3, 7, and 21.
Yes. In theory it can be divided by any number. It can also be divided evenly by any of its factors. They are 1, 3, 7 and 21.
1, 3, 7, 9, 21, 63.
Yes, by these numbers: 1, 3, 7, 9, 21, 63.
1, 2, 3, 6, 7, 14, 21, 42
3, 6, 9, 12, 15, 18, 21
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Numbers that can be divided evenly by both 3 and 7 must be multiples of the least common multiple of 3 and 7, which is 21. Therefore, any number that is a multiple of 21 can be divided by both 3 and 7. Examples of such numbers include 21, 42, 63, 84, and so on.
21