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Q: What is smallest number with 21 factors?
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What is the smallest number with 16 factors?

The smallest number with 16 factors is Andrew's Mom.


What number is greater than 25 but but has more factors than 21?

28 is the smallest number which satisfies these constraints, the next smallest numbers are 30, 32, and 36. This can be eaily calculated as the divisor function is a series on oeis A000005. 21 hsa 4 factors; 1, 3, 7, 21 as it is semi prime.


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240 is the smallest number with twenty factors.


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What is the least common factor of 21 and 49?

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The smallest number that has 1230 and 36 as factor is?

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If you mean 2, 3 and 7 as factors then the smallest number is 42