24 factors.
4,20 and,24 have 3 common factors and they are 1,2,4. :-)
They are: 1 and 3
1, 2, 3, 5, 6, 10, 15 & 30...making eight factors in all.
factors of 15 and 24
Five factors.
1000000
6
37 has two factors
24
The factors of 121 are: 1, 11, 121
Four factors.
one,two
24 factors.
24 factors.
24 factors.
Any of 39's factors can be common.