1,964 has six factors: 1, 2, 4, 491, 982, 1964
Eight factors.
Five factors.
6
1000000
37 has two factors
The factors of 121 are: 1, 11, 121
one,two
Four factors.
Any of 39's factors can be common.
Two: 1 and 7.
Three of them.
291 has four factors: 1, 3, 97, 291