1, 2, 7, 14, 49, 98, 343, 686
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The least common multiple (lcm) of two or more numbers is the product of all prime factors of the numbers to their highest powers.The prime factors of 686 are 2 and 73The prime factors of 365 are 5 and 73.The least common multiple of 686 and 365 is 250390 (2 x 5 x 73 x 73).
1372 = 2*686 = 2^2*343 = 2^2*7^3 So the factors are 1, 2, 4, 7, 14, 28, 49, 98, 196, 343, 686 and 1372 itself.
factors: 1, 2, 7, 14, 49, 98, 343, 686prime factors: (including each only once) 2, 7
It is: 686*50 = 34,300
The HCF of 686 is 686. But it's a factor as opposed to a common factor because there's only one number.