The prime factors of 123 are 3 and 41.
3 x 41 = 123
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123 is a composite number because it has more than two factors
To calculate manually if any number is a prime number, divide the number by ascending prime numbers until you reach the square root of the number. In this instance: 123/2 = 61.5 123/3 = 41 Therefore, 123 is not a prime number. However, since the first two factors we discovered are both prime - those being 3 and 41, it must not have any other factors.
The factors of 1845 are: 1, 3, 5, 9, 15, 41, 45, 123, 205, 369, 615, and 1845.The prime factors of 1845 are: 3, 5, and 41.
1, 3, 9, 41, 123, 271, 369, 813, 2439, 11111, 33333, 99999 3, 41 and 271 are prime.
123 3,41