To find all the divisors of the number 142,738,148:
- 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 142,738,148:
The prime factorization of a number: finding the prime numbers that multiply together to make that number.
142,738,148 = 22 × 7 × 79 × 173 × 373
142,738,148 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 142,738,148
- 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 =
7
composite factor = 2 × 7 =
14
composite factor = 2
2 × 7 =
28
prime factor =
79
composite factor = 2 × 79 =
158
prime factor =
173
composite factor = 2
2 × 79 =
316
composite factor = 2 × 173 =
346
prime factor =
373
composite factor = 7 × 79 =
553
composite factor = 2
2 × 173 =
692
composite factor = 2 × 373 =
746
composite factor = 2 × 7 × 79 =
1,106
composite factor = 7 × 173 =
1,211
composite factor = 2
2 × 373 =
1,492
composite factor = 2
2 × 7 × 79 =
2,212
composite factor = 2 × 7 × 173 =
2,422
composite factor = 7 × 373 =
2,611
composite factor = 2
2 × 7 × 173 =
4,844
composite factor = 2 × 7 × 373 =
5,222
composite factor = 2
2 × 7 × 373 =
10,444
This list continues below...
... This list continues from above
composite factor = 79 × 173 =
13,667
composite factor = 2 × 79 × 173 =
27,334
composite factor = 79 × 373 =
29,467
composite factor = 2
2 × 79 × 173 =
54,668
composite factor = 2 × 79 × 373 =
58,934
composite factor = 173 × 373 =
64,529
composite factor = 7 × 79 × 173 =
95,669
composite factor = 2
2 × 79 × 373 =
117,868
composite factor = 2 × 173 × 373 =
129,058
composite factor = 2 × 7 × 79 × 173 =
191,338
composite factor = 7 × 79 × 373 =
206,269
composite factor = 2
2 × 173 × 373 =
258,116
composite factor = 2
2 × 7 × 79 × 173 =
382,676
composite factor = 2 × 7 × 79 × 373 =
412,538
composite factor = 7 × 173 × 373 =
451,703
composite factor = 2
2 × 7 × 79 × 373 =
825,076
composite factor = 2 × 7 × 173 × 373 =
903,406
composite factor = 2
2 × 7 × 173 × 373 =
1,806,812
composite factor = 79 × 173 × 373 =
5,097,791
composite factor = 2 × 79 × 173 × 373 =
10,195,582
composite factor = 2
2 × 79 × 173 × 373 =
20,391,164
composite factor = 7 × 79 × 173 × 373 =
35,684,537
composite factor = 2 × 7 × 79 × 173 × 373 =
71,369,074
composite factor = 2
2 × 7 × 79 × 173 × 373 =
142,738,148
48 factors (divisors)
What times what is 142,738,148?
What number multiplied by what number equals 142,738,148?
All the combinations of any two natural numbers whose product equals 142,738,148.
1 × 142,738,148 = 142,738,148
2 × 71,369,074 = 142,738,148
4 × 35,684,537 = 142,738,148
7 × 20,391,164 = 142,738,148
14 × 10,195,582 = 142,738,148
28 × 5,097,791 = 142,738,148
79 × 1,806,812 = 142,738,148
158 × 903,406 = 142,738,148
173 × 825,076 = 142,738,148
316 × 451,703 = 142,738,148
346 × 412,538 = 142,738,148
373 × 382,676 = 142,738,148
553 × 258,116 = 142,738,148
692 × 206,269 = 142,738,148
746 × 191,338 = 142,738,148
1,106 × 129,058 = 142,738,148
1,211 × 117,868 = 142,738,148
1,492 × 95,669 = 142,738,148
2,212 × 64,529 = 142,738,148
2,422 × 58,934 = 142,738,148
2,611 × 54,668 = 142,738,148
4,844 × 29,467 = 142,738,148
5,222 × 27,334 = 142,738,148
10,444 × 13,667 = 142,738,148
24 unique multiplications The final answer:
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