To find all the divisors of the number 875,820:
- 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 875,820:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
875,820 = 22 × 3 × 5 × 11 × 1,327
875,820 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 875,820
- 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 = 2 × 5 =
10
prime factor =
11
composite factor = 2
2 × 3 =
12
composite factor = 3 × 5 =
15
composite factor = 2
2 × 5 =
20
composite factor = 2 × 11 =
22
composite factor = 2 × 3 × 5 =
30
composite factor = 3 × 11 =
33
composite factor = 2
2 × 11 =
44
composite factor = 5 × 11 =
55
composite factor = 2
2 × 3 × 5 =
60
composite factor = 2 × 3 × 11 =
66
composite factor = 2 × 5 × 11 =
110
composite factor = 2
2 × 3 × 11 =
132
composite factor = 3 × 5 × 11 =
165
composite factor = 2
2 × 5 × 11 =
220
composite factor = 2 × 3 × 5 × 11 =
330
composite factor = 2
2 × 3 × 5 × 11 =
660
This list continues below...
... This list continues from above
prime factor =
1,327
composite factor = 2 × 1,327 =
2,654
composite factor = 3 × 1,327 =
3,981
composite factor = 2
2 × 1,327 =
5,308
composite factor = 5 × 1,327 =
6,635
composite factor = 2 × 3 × 1,327 =
7,962
composite factor = 2 × 5 × 1,327 =
13,270
composite factor = 11 × 1,327 =
14,597
composite factor = 2
2 × 3 × 1,327 =
15,924
composite factor = 3 × 5 × 1,327 =
19,905
composite factor = 2
2 × 5 × 1,327 =
26,540
composite factor = 2 × 11 × 1,327 =
29,194
composite factor = 2 × 3 × 5 × 1,327 =
39,810
composite factor = 3 × 11 × 1,327 =
43,791
composite factor = 2
2 × 11 × 1,327 =
58,388
composite factor = 5 × 11 × 1,327 =
72,985
composite factor = 2
2 × 3 × 5 × 1,327 =
79,620
composite factor = 2 × 3 × 11 × 1,327 =
87,582
composite factor = 2 × 5 × 11 × 1,327 =
145,970
composite factor = 2
2 × 3 × 11 × 1,327 =
175,164
composite factor = 3 × 5 × 11 × 1,327 =
218,955
composite factor = 2
2 × 5 × 11 × 1,327 =
291,940
composite factor = 2 × 3 × 5 × 11 × 1,327 =
437,910
composite factor = 2
2 × 3 × 5 × 11 × 1,327 =
875,820
48 factors (divisors)
What times what is 875,820?
What number multiplied by what number equals 875,820?
All the combinations of any two natural numbers whose product equals 875,820.
1 × 875,820 = 875,820
2 × 437,910 = 875,820
3 × 291,940 = 875,820
4 × 218,955 = 875,820
5 × 175,164 = 875,820
6 × 145,970 = 875,820
10 × 87,582 = 875,820
11 × 79,620 = 875,820
12 × 72,985 = 875,820
15 × 58,388 = 875,820
20 × 43,791 = 875,820
22 × 39,810 = 875,820
30 × 29,194 = 875,820
33 × 26,540 = 875,820
44 × 19,905 = 875,820
55 × 15,924 = 875,820
60 × 14,597 = 875,820
66 × 13,270 = 875,820
110 × 7,962 = 875,820
132 × 6,635 = 875,820
165 × 5,308 = 875,820
220 × 3,981 = 875,820
330 × 2,654 = 875,820
660 × 1,327 = 875,820
24 unique multiplications The final answer:
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