2^2 x 5 x 11 = 220
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the answer is 220=2*2*5*11
220 = 2 x 2 x 5 x 11
The factorizations of both numbers use 2 and 5, and each has only two other factors (for 220, 2 and 11 - for 390, 3 and 13, which represent the primes immediately following the ones for 220).
The positive integer factors of 440 are as follows: 1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 220, 440 The prime factorization of 440 is as follows: 23 x 5 x 11 = 440
220 is not a prime number because it is divisible by a number other than itself and the number 1. No even number other than 2 is a prime because they can all be divided by 2.