1,30 2,15 3,10 5,6 Common factors are factors that two or more numbers have in common. A single number cannot have common factors. A single number can have factors, prime factors, and proper factors. The factors of 30 are listed above.
The prime factors of 30 are 2, 3, and 5.
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The common factors of 30 and 63 are 1 and 3.
The common factors of 30 and 21 are 1 and 3.
The common factors of 30 and 40 are: 1, 2, 5, 10.
The common factors of 10 and 30 are: 1, 2, 5, and 10
The common factors of 4, 12, and 30 are 1 and 2.