Prime Numbers
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Numbers
Compare 1 vs 21
Compare 1 vs 21
Compare
vs
Compare
Property
1
21
Type
composite number
semiprime
Unique factors
0
2
Total factors
0
2
Prime factorization
3
1
×
7
1
Prime factorization
3
×
7
Divisors count
1
4
Divisors
1
1
,
3
,
7
,
21