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Q: What is the smallest number with exactly 15 factors?

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240 is the smallest number with at least 19 factors. 240 has twenty factors: 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 48, 60, 80, 120, 240 262144 is the smallest number with EXACTLY 19 factors

It is actually 144

30.

360,360

This number would have to be a squared number as it only has 15 factors. The number I have calculated is 324 as the square root is 18

16

16

it is 400 the numbers that go in it are 1,2,4,5,8,10,20,40,50,80,100,200,400

The smallest number with exactly 36 factors is 1260. The factors are: 1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 28, 30, 35, 36, 42, 45, 60, 63, 70, 84, 90, 105, 126, 140, 180, 210, 252, 315, 420, 630, and 1260.

Any prime number to the 14th power, like 16384.

3969 satisfies those conditions.

which number is the smallest? 918 15 2

I'm not sure exactly what you're looking for. The factors of 15 are 1, 3, 5 and 15. The highest number that 15 can be divided by that will result in a whole number is 15.

30 2*15 3*10 5*6

The smallest common factor of 15 and 9 is 3. Factors of 15: 3, 5 Factors of 9: 3

The smallest number that is divisible by 20 and 15 is 60.

there is no whole number who's a multiple of 15 and a factor of 12. the factors of 12 are 3,4,6,2, The smallest multiple of 15 is 15, so it's not possible.

15 has more than exactly two factors (1, 3, 5, and 15), therefore it is composite. 17, 19, and 23 each have exactly 2 factors (1 and the number itself), so they are primes.

Factors are numbers which divide another number exactly. The factors of 11 are 1 and 11. The factors of 15 are 1, 3, 5 and 15. So the only common factor of 11 and 15 is 1.

The greatest common factor is the highest number that divides exactly into two or more numbers. Factors are numbers you can multiply together to get another number. Therefore, the common factors of 15 and 25 are 5 and 1.

the number 105 does - 1, 3, 5, 7, 15, 21, 35, 105

The smallest number is .18

Factors of 15 are: 1,3,5,15

The smallest three digit multiple of 15 is 105, which is 15 x 7.

72 is the second-smallest number with 12 factors. Its divisors are 1, 2, 3, 4, 6, 8, 9, 12, 18, 24, 36, and 72. The smallest number with 12 factors is 60. Its divisors are 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60.

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