About the Number

21271921

21271920 ← → 21271922

2進数表記:1010001001001010101110001

漢数字表記:二千百二十七万千九百二十一

素因数分解:

11 2 × 31 1 × 53 1 × 107 1

素因数の和:213
約数の個数: 24
約数和(自身を含む): 24820992
約数和(自身を除く): 3549071

約数列:
[1, 11, 31, 53, 107, 121, 341, 583, 1177, 1643, 3317, 3751, 5671, 6413, 12947, 18073, 36487, 62381, 175801, 198803, 401357, 686191, 1933811, 21271921]

約数ペア:
[(1, 21271921), (11, 1933811), (31, 686191), (53, 401357), (107, 198803), (121, 175801), (341, 62381), (583, 36487), (1177, 18073), (1643, 12947), (3317, 6413), (3751, 5671)]

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