That's a little redundant, since all factors are whole numbers. Factors are the numbers that multiply together to get a product. In the sentence 4 x 3 = 12, 4 and 3 are factors of 12; two whole number factors of 12.
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Called 'factors', the positive whole numbers that go into 201 evenly are: 1, 3, 67, 201.
Becuause when you divide those numbers into twenty, the answers are whole numbers.
Divide the number 32 by successive prime numbers to get the factors until you cant divide any more numbers... 32/1=32 (factors are 1 and 32) 32/2=16 (factors are 2 and 16) 32/3=does not divide to be a whole number 32/4=8 (factors are 4 and 8) 32/5=does not divide to be a whole number 32/6=does not divide to be a whole number 32/7=does not divide to be a whole number Now you done with all the numbers you can. Therefore 1,32,2,16,4 and 8 are factors.
1009 is a prime number so its only factors are 1 and itself.
Probably the most common use is in adding fractions with different denominators. The least common multiple of the denominators is the least common denominator. Each fraction can be converted to one with the common denominator, and then you can add the fractions by adding their numerators.