To find all the divisors of the number 238,326:
- 1. Decompose the number into prime factors.
- See how you can find out how many factors (divisors) the number has, without actually calculating them.
- 2. Multiply the prime factors in all their unique combinations, that yield different results.
1. Carry out the prime factorization of the number 238,326:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
238,326 = 2 × 3 × 11 × 23 × 157
238,326 is not a prime number but a composite one.
- Prime number: a natural number that is divisible (divided evenly) only by 1 and itself. A prime number has exactly two factors: 1 and the number itself.
- Examples of prime numbers: 2 (factors 1, 2), 3 (factors 1, 3), 5 (factors 1, 5), 7 (factors 1, 7), 11 (factors 1, 11), 13 (factors 1, 13), ...
- Composite number: a natural number that has at least one factor other than 1 and itself. So it is neither a prime number nor 1.
- Examples of composite numbers: 4 (it has 3 factors: 1, 2, 4), 6 (it has 4 factors: 1, 2, 3, 6), 8 (it has 4 factors: 1, 2, 4, 8), 9 (it has 3 factors: 1, 3, 9), 10 (it has 4 factors: 1, 2, 5, 10), 12 (it has 6 factors: 1, 2, 3, 4, 6, 12), ...
How to count the number of factors of a number?
Without actually finding the factors
- If a number N is prime factorized as:
N = am × bk × cz
where a, b, c are the prime factors and m, k, z are their exponents, natural numbers, .... - ...
- Then the number of factors of the number N can be calculated as:
n = (m + 1) × (k + 1) × (z + 1) - ...
- In our case, the number of factors is calculated as:
- n = (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 2 × 2 × 2 × 2 × 2 = 32
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 238,326
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also add 1 to the list of factors (divisors). All the numbers are divisible by 1.
All the factors (divisors) are listed below - in ascending order
The list of factors (divisors):
Numbers other than 1 that are not prime factors are composite factors (divisors).
neither prime nor composite =
1
prime factor =
2
prime factor =
3
composite factor = 2 × 3 =
6
prime factor =
11
composite factor = 2 × 11 =
22
prime factor =
23
composite factor = 3 × 11 =
33
composite factor = 2 × 23 =
46
composite factor = 2 × 3 × 11 =
66
composite factor = 3 × 23 =
69
composite factor = 2 × 3 × 23 =
138
prime factor =
157
composite factor = 11 × 23 =
253
composite factor = 2 × 157 =
314
composite factor = 3 × 157 =
471
This list continues below...
... This list continues from above
composite factor = 2 × 11 × 23 =
506
composite factor = 3 × 11 × 23 =
759
composite factor = 2 × 3 × 157 =
942
composite factor = 2 × 3 × 11 × 23 =
1,518
composite factor = 11 × 157 =
1,727
composite factor = 2 × 11 × 157 =
3,454
composite factor = 23 × 157 =
3,611
composite factor = 3 × 11 × 157 =
5,181
composite factor = 2 × 23 × 157 =
7,222
composite factor = 2 × 3 × 11 × 157 =
10,362
composite factor = 3 × 23 × 157 =
10,833
composite factor = 2 × 3 × 23 × 157 =
21,666
composite factor = 11 × 23 × 157 =
39,721
composite factor = 2 × 11 × 23 × 157 =
79,442
composite factor = 3 × 11 × 23 × 157 =
119,163
composite factor = 2 × 3 × 11 × 23 × 157 =
238,326
32 factors (divisors)
What times what is 238,326?
What number multiplied by what number equals 238,326?
All the combinations of any two natural numbers whose product equals 238,326.
1 × 238,326 = 238,326
2 × 119,163 = 238,326
3 × 79,442 = 238,326
6 × 39,721 = 238,326
11 × 21,666 = 238,326
22 × 10,833 = 238,326
23 × 10,362 = 238,326
33 × 7,222 = 238,326
46 × 5,181 = 238,326
66 × 3,611 = 238,326
69 × 3,454 = 238,326
138 × 1,727 = 238,326
157 × 1,518 = 238,326
253 × 942 = 238,326
314 × 759 = 238,326
471 × 506 = 238,326
16 unique multiplications The final answer:
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