30的因數is what?

因數即是可除盡30的數
如

1×30 = 30
2×15 = 30
3×10 = 30
5×6 = 30

1,2,3,5,6,10,15,30
1,2,3,5,6,10,15,30

It is so easy.

Look!Look!

1,2,3,5,6,10,15,30

Now,I ask you:

7287840的因數有麼數???

30
= 1 x 30
= 2 x 15
= 3 x 10
= 5 x 6

1,2,3,5,6,10,15,30

1,2,3,5,6,10,15,30

It's 1,2,3,5,6,10,15 and 30.

Hope I can help you.

30x1=30
15x2=30
10x3=30
6x5=30
So the factor(因數) of 30 is 1,2,3,5,6,10,15,30.

1, 2, 3, 5, 6, 10, 15, 30

1,2,3,5,6,10,15,30

1×30 = 30
2×15 = 30
3×10 = 30
5×6 = 30

1, 2, 3, 5, 6, 10, 15 and 30