The GCF is 42.
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Step 1. Factor them. 2 x 3 x 3 x 7 x 11 = 1386 2 x 3 x 7 x 7 x 7 = 2058 Step 2. Combine the factors, eliminating duplicates. 2 x 3 x 3 x 7 x 7 x 7 x 11 = 67914, the LCM Step 3. Accept congratulations humbly.
The least common multiple (LCM) of two numbers is the smallest number that is a multiple of both numbers. In this case, the prime factorization of 49 is 7^2 and the prime factorization of 343 is 7^3. The LCM is found by taking the highest power of each prime factor that appears in either number, so the LCM of 49 and 343 is 7^3, which equals 343.
1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 49, 63, 98, 126, 147, 294, 343, 441, 686, 882, 1029, 2058, 3087, 6174
factors: 1, 2, 3, 4, 6, 7, 9, 12, 14, 18, 21, 28, 36, 42, 49, 63, 84, 98, 126, 147, 196, 252, 294, 343, 441, 588, 686, 882, 1029, 1372, 1764, 2058, 3087, 4116, 6174, 12348 prime factors: 2(2), 3(2), 7(3)
If you mean "factors|": 1, 2, 3, 6, 7, 14, 21, 42 If you mean prime factors: 42 = 2 x 3 x 7 The multiples of 42 are: 42, 84, 126, 168, 210, 252, 294, 336, 378, 420, 462, 504, 546, 588, 630, 672, 714, 756, 798, 840, 882, 924, 966, 1008, 1050, 1092, 1134, 1176, 1218, 1260, 1302, 1344, 1386, 1428, 1470, 1512, 1554, 1596, 1638, 1680, 1722, 1764, 1806, 1848, 1890, 1932, 1974, 2016, 2058, 2100, 2142, 2184, 2226, 2268, 2310, 2352, 2394, 2436, 2478, 2520, 2562, 2604, 2646, 2688, 2730, 2772, 2814, 2856, 2898, 2940, 2982, 3024, 3066, 3108, 3150, 3192, 3234, 3276, 3318, 3360, 3402, 3444, 3486, 3528, 3570, 3612, 3654, 3696, 3738, 3780, 3822, 3864, 3906, 3948, 3990, 4032, 4074, 4116, 4158, 4200, ...