To find all the divisors of the number 88,880:
- 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 88,880:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
88,880 = 24 × 5 × 11 × 101
88,880 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 88,880
- 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
prime factor =
5
composite factor = 2
3 =
8
composite factor = 2 × 5 =
10
prime factor =
11
composite factor = 2
4 =
16
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 2
3 × 5 =
40
composite factor = 2
2 × 11 =
44
composite factor = 5 × 11 =
55
composite factor = 2
4 × 5 =
80
composite factor = 2
3 × 11 =
88
prime factor =
101
composite factor = 2 × 5 × 11 =
110
composite factor = 2
4 × 11 =
176
composite factor = 2 × 101 =
202
composite factor = 2
2 × 5 × 11 =
220
This list continues below...
... This list continues from above
composite factor = 2
2 × 101 =
404
composite factor = 2
3 × 5 × 11 =
440
composite factor = 5 × 101 =
505
composite factor = 2
3 × 101 =
808
composite factor = 2
4 × 5 × 11 =
880
composite factor = 2 × 5 × 101 =
1,010
composite factor = 11 × 101 =
1,111
composite factor = 2
4 × 101 =
1,616
composite factor = 2
2 × 5 × 101 =
2,020
composite factor = 2 × 11 × 101 =
2,222
composite factor = 2
3 × 5 × 101 =
4,040
composite factor = 2
2 × 11 × 101 =
4,444
composite factor = 5 × 11 × 101 =
5,555
composite factor = 2
4 × 5 × 101 =
8,080
composite factor = 2
3 × 11 × 101 =
8,888
composite factor = 2 × 5 × 11 × 101 =
11,110
composite factor = 2
4 × 11 × 101 =
17,776
composite factor = 2
2 × 5 × 11 × 101 =
22,220
composite factor = 2
3 × 5 × 11 × 101 =
44,440
composite factor = 2
4 × 5 × 11 × 101 =
88,880
40 factors (divisors)
What times what is 88,880?
What number multiplied by what number equals 88,880?
All the combinations of any two natural numbers whose product equals 88,880.
1 × 88,880 = 88,880
2 × 44,440 = 88,880
4 × 22,220 = 88,880
5 × 17,776 = 88,880
8 × 11,110 = 88,880
10 × 8,888 = 88,880
11 × 8,080 = 88,880
16 × 5,555 = 88,880
20 × 4,444 = 88,880
22 × 4,040 = 88,880
40 × 2,222 = 88,880
44 × 2,020 = 88,880
55 × 1,616 = 88,880
80 × 1,111 = 88,880
88 × 1,010 = 88,880
101 × 880 = 88,880
110 × 808 = 88,880
176 × 505 = 88,880
202 × 440 = 88,880
220 × 404 = 88,880
20 unique multiplications The final answer:
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