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How do you know that you have all factors of any number being considered?
Wiki User
∙ 11y ago
If you know the prime factorization of a number, you can find out the total number of factors.
Example: 210
21 x 31 x 51 x 71 = 210
Add one to the exponents and multiply them.
2 x 2 x 2 x 2 = 16, the total number of factors.
You know that 1, 2, 3, 5, and 7 are factors. You need three more to get halfway.
2 x 3 = 6
2 x 5 = 10
2 x 7 = 14
Divide all those numbers into 210.
1, 2, 3, 5, 6, 7, 10, 14, 15, 21, 30, 35, 42, 70, 105, 210
Wiki User
∙ 11y ago
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How do you know you found all factors to a number?
How to know that you found all the factors for example my teacher taught me that when u reach a double diget number that is all the factors. ( 6x6)-~ double diget number
What you know about the factors when the products are square numbers?
There will be an odd number of different factors.
How do you know when you have found the longest string of factors for a number?
When all the factors are prime.
How do you know 43 is a prime number?
43 has only two factors : 1 and 43. Any number with only two factors, ie. 1 and itself, is a prime number. Factors are whole numbers which the original number is divisble by.
Which smallest odd number have 24 divisors as factors?
I don't know if it's the smallest, but 94,143,178,827 has 24 factors.
Which are factors that might influence a persons political opinions?
all of these can be considered factors
How do you know you found all factors to a number?
How to know that you found all the factors for example my teacher taught me that when u reach a double diget number that is all the factors. ( 6x6)-~ double diget number
Do you need to know all of the factors of a number to know it is prime or composite?
To know that a number is prime you need to know that it has no factors other than 1 and the number itself.To know that a number is composite you only need to know one factor other than the number itself or 1.
Why do you need to know all of the factors to a number to know if it is a prime or composite number?
You don't.If you know just one factor, other than 1 and the number itself, you will know that the number is composite.A prime has only two factors: 1 and itself. So all the factors is no big deal.
Do numbers always have more than two factors?
No, an odd number can have any number of factors. There is no limit but you do know that the number 2 is not one of those factors.
What you know about the factors when the products are square numbers?
There will be an odd number of different factors.
How do you know when you have found the longest string of factors for a number?
When all the factors are prime.
How do you know a number is a composite number?
It has more than two factors.
Do you need to know all of the factors of a number in order to determine if it is a prime or composite?
Yes, you do. And know them well, or else you'll get it wrong! Well, not exactly. To determine that a number is prime you need to know that the number has exactly two factors, which means that there are no other factors. You know that a number is composite by finding just one factor that is neither one nor the number itself.
How do you figure out prime numbers not knowing there factors?
But you do know the factors of prime numbers. Every prime number has two factors: one and the number itself.
How do you know that 7 is a prime number?
You know that 7 is a prime number because it only has two factors.
How do you know when you have found the longest possible sting factors of a number?
All of the factors are prime.
