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If a number is a perfect square, then you might say that one of its factors
is a factor twice, so the list of factors has an odd number of entries.
Example: 16.
Factors of 16: 1, 2, 4, 8, 16.
One of the "factor pairs" of 16 is [ 4 x 4 ], but '4' only shows up once on the list.
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Continue Learning about Math & Arithmetic
Can an odd number have odd numbers of factors?
Yes. Square numbers have an odd number of factors. 49 has three factors.
What is another name for an odd number of factors?
Square numbers have an odd number of factors.
What number has an odd number for a factor?
All odd numbers have odd factors.
Is the number of factors of any square number odd or even?
Odd.
Why are all the factors of 55 odds?
Because 55 is an odd number. All the factors of odd numbers are odd.
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