2 x 360
3 x 240
4 x 180
5 x 144
6 x 120
8 x 90
9 x 80
10 x 72
12 x 60
15 x 48
16 x 45
18 x 40
20 x 36
24 x 30
2 x 2 x 180
2 x 3 x 120
2 x 5 x 72
3 x 3 x 80
3 x 5 x 48
2 x 2 x 2 x 90
2 x 2 x 3 x 60
2 x 2 x 5 x 36
2 x 3 x 5 x 24
3 x 3 x 5 x 15
2 x 3 x 3 x 40
2 x 2 x 2 x 2 x 45
2 x 2 x 2 x 3 x 30
2 x 2 x 2 x 5 x 18
2 x 2 x 3 x 3 x 20
2 x 2 x 3 x 5 x 12
2 x 3 x 3 x 5 x 8
2 x 2 x 2 x 2 x 3 x 15
2 x 2 x 2 x 2 x 5 x 9
2 x 2 x 3 x 3 x 4 x 5
2 x 2 x 2 x 2 x 3 x 3 x 5
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720 360,2 180,2,2 90,2,2,2 45,2,2,2,2 15,3,2,2,2,2 5,3,3,2,2,2,2
The GCF is 40.
2 x 2 x 2 x 2 x 3 x 3 x 5 = 720
Well, honey, the highest common factor of 405 and 720 is 45. It's like finding the biggest slice of cake you can share between those two numbers - in this case, it's a slice of 45. So, there you have it, 45 is the boss when it comes to dividing up 405 and 720.
A factor string is a name for a number sentence written as a product of two or more factors.2 x 3 is a factor string for 6.