Factors of 1 to 10 numbers
1 = 1
2 = 1x2
3 = 1x3
4 = 1x2x2
5 = 1x5
6 = 1x2x3
7 = 1x7
8 = 1x2x2x2
9 = 1x3x3
10 = 1x2x5
L.C.M of numbers from 1 to 10 is = 1x2x2x2x3x3x5x7 = 2520
Hence the least number that is divisible by all the numbers from 1 to 10 is 2520.