To find all the divisors of the number 48,750:
- 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 48,750:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
48,750 = 2 × 3 × 54 × 13
48,750 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) × (4 + 1) × (1 + 1) = 2 × 2 × 5 × 2 = 40
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 48,750
- 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
prime factor =
3
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 2 × 5 =
10
prime factor =
13
composite factor = 3 × 5 =
15
composite factor = 5
2 =
25
composite factor = 2 × 13 =
26
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 13 =
39
composite factor = 2 × 5
2 =
50
composite factor = 5 × 13 =
65
composite factor = 3 × 5
2 =
75
composite factor = 2 × 3 × 13 =
78
composite factor = 5
3 =
125
composite factor = 2 × 5 × 13 =
130
composite factor = 2 × 3 × 5
2 =
150
composite factor = 3 × 5 × 13 =
195
This list continues below...
... This list continues from above
composite factor = 2 × 5
3 =
250
composite factor = 5
2 × 13 =
325
composite factor = 3 × 5
3 =
375
composite factor = 2 × 3 × 5 × 13 =
390
composite factor = 5
4 =
625
composite factor = 2 × 5
2 × 13 =
650
composite factor = 2 × 3 × 5
3 =
750
composite factor = 3 × 5
2 × 13 =
975
composite factor = 2 × 5
4 =
1,250
composite factor = 5
3 × 13 =
1,625
composite factor = 3 × 5
4 =
1,875
composite factor = 2 × 3 × 5
2 × 13 =
1,950
composite factor = 2 × 5
3 × 13 =
3,250
composite factor = 2 × 3 × 5
4 =
3,750
composite factor = 3 × 5
3 × 13 =
4,875
composite factor = 5
4 × 13 =
8,125
composite factor = 2 × 3 × 5
3 × 13 =
9,750
composite factor = 2 × 5
4 × 13 =
16,250
composite factor = 3 × 5
4 × 13 =
24,375
composite factor = 2 × 3 × 5
4 × 13 =
48,750
40 factors (divisors)
What times what is 48,750?
What number multiplied by what number equals 48,750?
All the combinations of any two natural numbers whose product equals 48,750.
1 × 48,750 = 48,750
2 × 24,375 = 48,750
3 × 16,250 = 48,750
5 × 9,750 = 48,750
6 × 8,125 = 48,750
10 × 4,875 = 48,750
13 × 3,750 = 48,750
15 × 3,250 = 48,750
25 × 1,950 = 48,750
26 × 1,875 = 48,750
30 × 1,625 = 48,750
39 × 1,250 = 48,750
50 × 975 = 48,750
65 × 750 = 48,750
75 × 650 = 48,750
78 × 625 = 48,750
125 × 390 = 48,750
130 × 375 = 48,750
150 × 325 = 48,750
195 × 250 = 48,750
20 unique multiplications The final answer:
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