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21
3,7
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
21 3,7
21/ \7 3
21 is equal to 3 times 7.
it is ^ ^ 21 5 ^ 7 3
84 42 2 21 2 2 square root of 21 84 2 42 factor tree 6 7 2 3
21 3,7 3 x 7 = 21
1
3 and 7