199 and 11
23 :]
67
The prime factorization of a number is all of the prime numbers that make up a composite number. All composite numbers can be expressed as unique products of prime numbers. The factorization is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor tree can help you visualize this. Example: 210 210 Divide by two. 105,2 Divide by three. 35,3,2 Divide by five. 7,5,3,2 Stop. All the factors are prime. 2 x 3 x 5 x 7 = 210 That's the prime factorization of 210.
44
The smallest prime number, of course, is 2. The smallest prime number whose digits add up to 2 is, of course, 2. The next-smallest is 11. It is left as an exercise for the reader to determine whether the other numbers whose digits add up to 2 (e.g. 101, 1001, 10001) are prime.
How about: 167+2 = 169
It's just like a factor tree, except the original number goes on the bottom and the factors go above it. All composite numbers can be expressed as unique products of prime numbers. This is accomplished by dividing the original number and its factors by prime numbers until all the factors are prime. A factor rainbow can help you visualize this. Follow the steps in order. Example: 210 7,5,3,2 (4.) Stop. All the factors are prime. 35,3,2 (3.) Divide by five. 105,2 (2.) Divide by three. 210 (1.) Divide by two. 2 x 3 x 5 x 7 = 210 That's the prime factorization of 210.
Assuming that "adds up to" means "its digits add up to" 888
No...read up on the Question: What is a Prime Number?
Well, honey, any number that is a square of a prime number will have more than 10 factors. So, for example, 16 is the square of 4, a prime number, and it has 10 factors. But if you want more than 10 factors, you gotta step it up to numbers like 36, which is the square of 6, and has 18 factors. Math can be sassy too, you know!
List the number at the bottom. Break it down into factors by placing them on successive lines above the original number. Stop when all the factors are prime. 7,5,3,2 35,3,2 105,2 210
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