To find all the divisors of the number 210,012:
- 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 210,012:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
210,012 = 22 × 3 × 11 × 37 × 43
210,012 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) × (1 + 1) × (1 + 1) × (1 + 1) × (1 + 1) = 3 × 2 × 2 × 2 × 2 = 48
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 210,012
- 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
composite factor = 2 × 3 =
6
prime factor =
11
composite factor = 2
2 × 3 =
12
composite factor = 2 × 11 =
22
composite factor = 3 × 11 =
33
prime factor =
37
prime factor =
43
composite factor = 2
2 × 11 =
44
composite factor = 2 × 3 × 11 =
66
composite factor = 2 × 37 =
74
composite factor = 2 × 43 =
86
composite factor = 3 × 37 =
111
composite factor = 3 × 43 =
129
composite factor = 2
2 × 3 × 11 =
132
composite factor = 2
2 × 37 =
148
composite factor = 2
2 × 43 =
172
composite factor = 2 × 3 × 37 =
222
composite factor = 2 × 3 × 43 =
258
composite factor = 11 × 37 =
407
composite factor = 2
2 × 3 × 37 =
444
This list continues below...
... This list continues from above
composite factor = 11 × 43 =
473
composite factor = 2
2 × 3 × 43 =
516
composite factor = 2 × 11 × 37 =
814
composite factor = 2 × 11 × 43 =
946
composite factor = 3 × 11 × 37 =
1,221
composite factor = 3 × 11 × 43 =
1,419
composite factor = 37 × 43 =
1,591
composite factor = 2
2 × 11 × 37 =
1,628
composite factor = 2
2 × 11 × 43 =
1,892
composite factor = 2 × 3 × 11 × 37 =
2,442
composite factor = 2 × 3 × 11 × 43 =
2,838
composite factor = 2 × 37 × 43 =
3,182
composite factor = 3 × 37 × 43 =
4,773
composite factor = 2
2 × 3 × 11 × 37 =
4,884
composite factor = 2
2 × 3 × 11 × 43 =
5,676
composite factor = 2
2 × 37 × 43 =
6,364
composite factor = 2 × 3 × 37 × 43 =
9,546
composite factor = 11 × 37 × 43 =
17,501
composite factor = 2
2 × 3 × 37 × 43 =
19,092
composite factor = 2 × 11 × 37 × 43 =
35,002
composite factor = 3 × 11 × 37 × 43 =
52,503
composite factor = 2
2 × 11 × 37 × 43 =
70,004
composite factor = 2 × 3 × 11 × 37 × 43 =
105,006
composite factor = 2
2 × 3 × 11 × 37 × 43 =
210,012
48 factors (divisors)
What times what is 210,012?
What number multiplied by what number equals 210,012?
All the combinations of any two natural numbers whose product equals 210,012.
1 × 210,012 = 210,012
2 × 105,006 = 210,012
3 × 70,004 = 210,012
4 × 52,503 = 210,012
6 × 35,002 = 210,012
11 × 19,092 = 210,012
12 × 17,501 = 210,012
22 × 9,546 = 210,012
33 × 6,364 = 210,012
37 × 5,676 = 210,012
43 × 4,884 = 210,012
44 × 4,773 = 210,012
66 × 3,182 = 210,012
74 × 2,838 = 210,012
86 × 2,442 = 210,012
111 × 1,892 = 210,012
129 × 1,628 = 210,012
132 × 1,591 = 210,012
148 × 1,419 = 210,012
172 × 1,221 = 210,012
222 × 946 = 210,012
258 × 814 = 210,012
407 × 516 = 210,012
444 × 473 = 210,012
24 unique multiplications The final answer:
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