To find all the divisors of the number 43,472:
- 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 43,472:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
43,472 = 24 × 11 × 13 × 19
43,472 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 = (4 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 5 × 2 × 2 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 43,472
- Multiply the prime factors involved in the prime factorization of the number in all their unique combinations, that give different results.
- Also consider the exponents of these prime factors.
- 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
composite factor = 2
2 =
4
composite factor = 2
3 =
8
prime factor =
11
prime factor =
13
composite factor = 2
4 =
16
prime factor =
19
composite factor = 2 × 11 =
22
composite factor = 2 × 13 =
26
composite factor = 2 × 19 =
38
composite factor = 2
2 × 11 =
44
composite factor = 2
2 × 13 =
52
composite factor = 2
2 × 19 =
76
composite factor = 2
3 × 11 =
88
composite factor = 2
3 × 13 =
104
composite factor = 11 × 13 =
143
composite factor = 2
3 × 19 =
152
composite factor = 2
4 × 11 =
176
composite factor = 2
4 × 13 =
208
This list continues below...
... This list continues from above
composite factor = 11 × 19 =
209
composite factor = 13 × 19 =
247
composite factor = 2 × 11 × 13 =
286
composite factor = 2
4 × 19 =
304
composite factor = 2 × 11 × 19 =
418
composite factor = 2 × 13 × 19 =
494
composite factor = 2
2 × 11 × 13 =
572
composite factor = 2
2 × 11 × 19 =
836
composite factor = 2
2 × 13 × 19 =
988
composite factor = 2
3 × 11 × 13 =
1,144
composite factor = 2
3 × 11 × 19 =
1,672
composite factor = 2
3 × 13 × 19 =
1,976
composite factor = 2
4 × 11 × 13 =
2,288
composite factor = 11 × 13 × 19 =
2,717
composite factor = 2
4 × 11 × 19 =
3,344
composite factor = 2
4 × 13 × 19 =
3,952
composite factor = 2 × 11 × 13 × 19 =
5,434
composite factor = 2
2 × 11 × 13 × 19 =
10,868
composite factor = 2
3 × 11 × 13 × 19 =
21,736
composite factor = 2
4 × 11 × 13 × 19 =
43,472
40 factors (divisors)
What times what is 43,472?
What number multiplied by what number equals 43,472?
All the combinations of any two natural numbers whose product equals 43,472.
1 × 43,472 = 43,472
2 × 21,736 = 43,472
4 × 10,868 = 43,472
8 × 5,434 = 43,472
11 × 3,952 = 43,472
13 × 3,344 = 43,472
16 × 2,717 = 43,472
19 × 2,288 = 43,472
22 × 1,976 = 43,472
26 × 1,672 = 43,472
38 × 1,144 = 43,472
44 × 988 = 43,472
52 × 836 = 43,472
76 × 572 = 43,472
88 × 494 = 43,472
104 × 418 = 43,472
143 × 304 = 43,472
152 × 286 = 43,472
176 × 247 = 43,472
208 × 209 = 43,472
20 unique multiplications The final answer:
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