The prime factors of 392 are 2, 2, 2, 7, and 7. To find the prime factors, you divide 392 by the smallest Prime number (2) until you cannot divide evenly. The factors of 392 are 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, and 392. These are all the numbers that can divide evenly into 392.
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72 *23
2 x 2 x 2 x 7 x 7 = 392
The positive integer factors of 392 are: 1, 2, 4, 7, 8, 14, 28, 49, 56, 98, 196, 392
The factors of 784 are 1, 2, 4, 7, 8, 14, 16, 28, 49, 56, 98, 112, 196, 392, and 784. The prime factors of 784 are 2 x 2 x 2 x 2 x 7 x 7.
2 2 2 7 7 392 = 2*2*2*7*7 or 23*72