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Factors of 123

"Factors of a Number" Calculator

What are the Factors of 123?

Answer

Factors of 123:

1, 3, 41, 123

4 factors · 123 = 3 × 41 · composite

Underlined — prime: 3, 41 · 1 — neither prime nor composite · others — composite

Factor pairs of 123

2 pairs: 1 × 123 · 3 × 41

Past √123 ≈ 11.09 every pair would repeat one already found — so checking stops at 11.

123 = 3 × 41 → (1 + 1) × (1 + 1) = 4 factors: add 1 to each exponent and multiply.

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See Also

Prime Number Checker - Find out whether a given number is Prime or not
Prime Factorization - Prime Factorization Calculator
Prime Numbers List - List of all Prime Numbers - how many Prime numbers are between

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Factors of 123. Factors of 123: full list and factor pairs.

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Factors Table

Number	Factors
108	1, 2, 3, 4, 6, 9, 12, 18, 27, 36, 54, 108
109	1, 109
110	1, 2, 5, 10, 11, 22, 55, 110
111	1, 3, 37, 111
112	1, 2, 4, 7, 8, 14, 16, 28, 56, 112
113	1, 113
114	1, 2, 3, 6, 19, 38, 57, 114
115	1, 5, 23, 115
116	1, 2, 4, 29, 58, 116
117	1, 3, 9, 13, 39, 117
118	1, 2, 59, 118
119	1, 7, 17, 119
120	1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 20, 24, 30, 40, 60, 120
121	1, 11, 121
122	1, 2, 61, 122
123	1, 3, 41, 123
124	1, 2, 4, 31, 62, 124
125	1, 5, 25, 125
126	1, 2, 3, 6, 7, 9, 14, 18, 21, 42, 63, 126
127	1, 127
128	1, 2, 4, 8, 16, 32, 64, 128
129	1, 3, 43, 129
130	1, 2, 5, 10, 13, 26, 65, 130
131	1, 131
132	1, 2, 3, 4, 6, 11, 12, 22, 33, 44, 66, 132
133	1, 7, 19, 133
134	1, 2, 67, 134
135	1, 3, 5, 9, 15, 27, 45, 135
136	1, 2, 4, 8, 17, 34, 68, 136
137	1, 137

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FAQ

What are the Factors of 123?

Factors of 123: 1, 3, 41, 123

How many factors does 123 have?

Number 123 has 4 factors

How many Factor Pairs does 123 have?

Number 123 has 2 factor pairs

Is 123 a prime or composite number?

Composite: 123 = 3 × 41, so it has 4 factors — a prime has exactly two.

How many factors does 123 have excluding 1 and 123?

2: 3 and 41.