LCM for 121 and 280

The first method to find LCM for numbers 121 and 280 is to find Greatest Common Factor (GCF) of these numbers. Here's the formula:

LCM = (Number1 × Number2) ÷ GCF

GCF of numbers 121 and 280 is 1, so

LCM = (121 × 280) ÷ 1

LCM = 33,880 ÷ 1

LCM = 33,880

The second method to find LCM for numbers 121 and 280 is to list out the common multiples for both numbers and pick the first one that matches:

Multiples of 121: 121, 242, 363, 484, 605, 726, 847, 968, 1,089, 1,210, 1,331, 1,452, 1,573, 1,694, 1,815, 1,936, 2,057, 2,178, 2,299, 2,420, 2,541, 2,662, 2,783, 2,904, 3,025, 3,146, 3,267, 3,388, 3,509, 3,630, 3,751, 3,872, 3,993, 4,114, 4,235, 4,356, 4,477, 4,598, 4,719, 4,840, 4,961, 5,082, 5,203, 5,324, 5,445, 5,566, 5,687, 5,808, 5,929, 6,050, 6,171, 6,292, 6,413, 6,534, 6,655, 6,776, 6,897, 7,018, 7,139, 7,260, 7,381, 7,502, 7,623, 7,744, 7,865, 7,986, 8,107, 8,228, 8,349, 8,470, 8,591, 8,712, 8,833, 8,954, 9,075, 9,196, 9,317, 9,438, 9,559, 9,680, 9,801, 9,922, 10,043, 10,164, 10,285, 10,406, 10,527, 10,648, 10,769, 10,890, 11,011, 11,132, 11,253, 11,374, 11,495, 11,616, 11,737, 11,858, 11,979, 12,100, 12,221, 12,342, 12,463, 12,584, 12,705, 12,826, 12,947, 13,068, 13,189, 13,310, 13,431, 13,552, 13,673, 13,794, 13,915, 14,036, 14,157, 14,278, 14,399, 14,520, 14,641, 14,762, 14,883, 15,004, 15,125, 15,246, 15,367, 15,488, 15,609, 15,730, 15,851, 15,972, 16,093, 16,214, 16,335, 16,456, 16,577, 16,698, 16,819, 16,940, 17,061, 17,182, 17,303, 17,424, 17,545, 17,666, 17,787, 17,908, 18,029, 18,150, 18,271, 18,392, 18,513, 18,634, 18,755, 18,876, 18,997, 19,118, 19,239, 19,360, 19,481, 19,602, 19,723, 19,844, 19,965, 20,086, 20,207, 20,328, 20,449, 20,570, 20,691, 20,812, 20,933, 21,054, 21,175, 21,296, 21,417, 21,538, 21,659, 21,780, 21,901, 22,022, 22,143, 22,264, 22,385, 22,506, 22,627, 22,748, 22,869, 22,990, 23,111, 23,232, 23,353, 23,474, 23,595, 23,716, 23,837, 23,958, 24,079, 24,200, 24,321, 24,442, 24,563, 24,684, 24,805, 24,926, 25,047, 25,168, 25,289, 25,410, 25,531, 25,652, 25,773, 25,894, 26,015, 26,136, 26,257, 26,378, 26,499, 26,620, 26,741, 26,862, 26,983, 27,104, 27,225, 27,346, 27,467, 27,588, 27,709, 27,830, 27,951, 28,072, 28,193, 28,314, 28,435, 28,556, 28,677, 28,798, 28,919, 29,040, 29,161, 29,282, 29,403, 29,524, 29,645, 29,766, 29,887, 30,008, 30,129, 30,250, 30,371, 30,492, 30,613, 30,734, 30,855, 30,976, 31,097, 31,218, 31,339, 31,460, 31,581, 31,702, 31,823, 31,944, 32,065, 32,186, 32,307, 32,428, 32,549, 32,670, 32,791, 32,912, 33,033, 33,154, 33,275, 33,396, 33,517, 33,638, 33,759, 33,880, 34,001, 34,122

Multiples of 280: 280, 560, 840, 1,120, 1,400, 1,680, 1,960, 2,240, 2,520, 2,800, 3,080, 3,360, 3,640, 3,920, 4,200, 4,480, 4,760, 5,040, 5,320, 5,600, 5,880, 6,160, 6,440, 6,720, 7,000, 7,280, 7,560, 7,840, 8,120, 8,400, 8,680, 8,960, 9,240, 9,520, 9,800, 10,080, 10,360, 10,640, 10,920, 11,200, 11,480, 11,760, 12,040, 12,320, 12,600, 12,880, 13,160, 13,440, 13,720, 14,000, 14,280, 14,560, 14,840, 15,120, 15,400, 15,680, 15,960, 16,240, 16,520, 16,800, 17,080, 17,360, 17,640, 17,920, 18,200, 18,480, 18,760, 19,040, 19,320, 19,600, 19,880, 20,160, 20,440, 20,720, 21,000, 21,280, 21,560, 21,840, 22,120, 22,400, 22,680, 22,960, 23,240, 23,520, 23,800, 24,080, 24,360, 24,640, 24,920, 25,200, 25,480, 25,760, 26,040, 26,320, 26,600, 26,880, 27,160, 27,440, 27,720, 28,000, 28,280, 28,560, 28,840, 29,120, 29,400, 29,680, 29,960, 30,240, 30,520, 30,800, 31,080, 31,360, 31,640, 31,920, 32,200, 32,480, 32,760, 33,040, 33,320, 33,600, 33,880, 34,160, 34,440

So the LCM for 121 and 280 is 33,880

Another method to find LCM for numbers 121 and 280 is to list all Prime Factors for both numbers and multiply the highest exponent prime factors: