To find all the divisors of the number 722,060:
- 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 722,060:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
722,060 = 22 × 5 × 79 × 457
722,060 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) = 3 × 2 × 2 × 2 = 24
But to actually calculate the factors, see below...
2. Multiply the prime factors of the number 722,060
- 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 × 5 =
10
composite factor = 2
2 × 5 =
20
prime factor =
79
composite factor = 2 × 79 =
158
composite factor = 2
2 × 79 =
316
composite factor = 5 × 79 =
395
prime factor =
457
composite factor = 2 × 5 × 79 =
790
This list continues below...
... This list continues from above
composite factor = 2 × 457 =
914
composite factor = 2
2 × 5 × 79 =
1,580
composite factor = 2
2 × 457 =
1,828
composite factor = 5 × 457 =
2,285
composite factor = 2 × 5 × 457 =
4,570
composite factor = 2
2 × 5 × 457 =
9,140
composite factor = 79 × 457 =
36,103
composite factor = 2 × 79 × 457 =
72,206
composite factor = 2
2 × 79 × 457 =
144,412
composite factor = 5 × 79 × 457 =
180,515
composite factor = 2 × 5 × 79 × 457 =
361,030
composite factor = 2
2 × 5 × 79 × 457 =
722,060
24 factors (divisors)
What times what is 722,060?
What number multiplied by what number equals 722,060?
All the combinations of any two natural numbers whose product equals 722,060.
1 × 722,060 = 722,060
2 × 361,030 = 722,060
4 × 180,515 = 722,060
5 × 144,412 = 722,060
10 × 72,206 = 722,060
20 × 36,103 = 722,060
79 × 9,140 = 722,060
158 × 4,570 = 722,060
316 × 2,285 = 722,060
395 × 1,828 = 722,060
457 × 1,580 = 722,060
790 × 914 = 722,060
12 unique multiplications The final answer:
(scroll down)