The factors of 20 are: 1 2 4 5 10 20 The prime factors are: 2 x 2 x 5 & The factors of 28 are: 1 2 4 7 14 28 The prime factors are: 2 x 2 x 7 & GCD: 4
LCM: 140
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List all the factors of each number. Which factors are prime factors between 20 and 28.
12, 18 and 20 each have six factors.
The factors of 16 are 1, 2, 4, 8, and 16.
The common factors of 20 and 50 are: 1, 2, 5, 10.
The only perfect number between 20 and 50 is 28.