1, 13, 17 and 221.
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1, 13, 17, 221
Apart from itself and 1, the only numbers that divide evenly into 221 are 13 and 17. Therefore, 221 = 13 x 17.
No, 3 does not go into 221 evenly. 221 divided by 3 is 73.6 repeating.
Nothing can go evenly into 21 or 17. They are both odd numbers and therefore cannot be evenly divided.
1,2,4,8,16,32