To find all the divisors of the number 101,340:
- 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 101,340:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
101,340 = 22 × 32 × 5 × 563
101,340 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 = (2 + 1) × (2 + 1) × (1 + 1) × (1 + 1) = 3 × 3 × 2 × 2 = 36
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 101,340
- 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
composite factor = 2
2 =
4
prime factor =
5
composite factor = 2 × 3 =
6
composite factor = 3
2 =
9
composite factor = 2 × 5 =
10
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2 × 3
2 =
18
composite factor = 2
2 × 5 =
20
composite factor = 2 × 3 × 5 =
30
composite factor = 2
2 × 3
2 =
36
composite factor = 3
2 × 5 =
45
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 3
2 × 5 =
90
composite factor = 2
2 × 3
2 × 5 =
180
This list continues below...
... This list continues from above
prime factor =
563
composite factor = 2 × 563 =
1,126
composite factor = 3 × 563 =
1,689
composite factor = 2
2 × 563 =
2,252
composite factor = 5 × 563 =
2,815
composite factor = 2 × 3 × 563 =
3,378
composite factor = 3
2 × 563 =
5,067
composite factor = 2 × 5 × 563 =
5,630
composite factor = 2
2 × 3 × 563 =
6,756
composite factor = 3 × 5 × 563 =
8,445
composite factor = 2 × 3
2 × 563 =
10,134
composite factor = 2
2 × 5 × 563 =
11,260
composite factor = 2 × 3 × 5 × 563 =
16,890
composite factor = 2
2 × 3
2 × 563 =
20,268
composite factor = 3
2 × 5 × 563 =
25,335
composite factor = 2
2 × 3 × 5 × 563 =
33,780
composite factor = 2 × 3
2 × 5 × 563 =
50,670
composite factor = 2
2 × 3
2 × 5 × 563 =
101,340
36 factors (divisors)
What times what is 101,340?
What number multiplied by what number equals 101,340?
All the combinations of any two natural numbers whose product equals 101,340.
1 × 101,340 = 101,340
2 × 50,670 = 101,340
3 × 33,780 = 101,340
4 × 25,335 = 101,340
5 × 20,268 = 101,340
6 × 16,890 = 101,340
9 × 11,260 = 101,340
10 × 10,134 = 101,340
12 × 8,445 = 101,340
15 × 6,756 = 101,340
18 × 5,630 = 101,340
20 × 5,067 = 101,340
30 × 3,378 = 101,340
36 × 2,815 = 101,340
45 × 2,252 = 101,340
60 × 1,689 = 101,340
90 × 1,126 = 101,340
180 × 563 = 101,340
18 unique multiplications The final answer:
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