jane's favorite number is very special. the prime factors of this number don't repeat and are all the prime numbers less than 10. what is her favorite number?

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What are the prime factors less than 10?

One of them is not one. Sometimes it matters that you know that 1 is not prime.

The prime numbers under 10 are

2, 3 ,5, 7

When these are multiplied together, the answer is 210.

Jane's favorite number 210.