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What is the second smallest number that has 12345 as factors?
To find the second smallest number that has 12345 as factors, we need to consider the prime factorization of 12345, which is 3 x 5 x 823. The smallest number with 12345 as a factor is 12345 itself. The second smallest number would be obtained by multiplying 12345 by the next smallest prime number after 3 and 5, which is 7. Therefore, the second smallest number with 12345 as factors is 12345 x 7 = 86415.
What is a friendly number?
A friendly number is a number that has a lot of factors depending on the size of the number. For example, eight is a friendly number. Its factors are 8,4,2,1. 7 isn't because its only factors are 7 and 1.
What number is a factor of 21 but not a multiple of 7?
The factors of 21 are 1, 3, 7, 21. The factors which are not a multiple of 7 are 1 and 3.
What number is a factor of 14 but not a multiple of 2?
The factors of 14 are: 1, 2, 7, 14 → the factors which are not a multiple of 2 are 1 and 7.
All factors of 49?
A factor = a number which can be divided into the given number with no remainder ie 1, 7, 49 7 * 7 = 49
