About the Number

20831391

20831390 ← → 20831392

2進数表記:1001111011101110010011111

漢数字表記:二千八十三万千三百九十一

素因数分解:

3 3 × 7 1 × 19 1 × 5801 1

素因数の和:5836
約数の個数: 32
約数和(自身を含む): 37132800
約数和(自身を除く): 16301409

約数列:
[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 5801, 17403, 40607, 52209, 110219, 121821, 156627, 330657, 365463, 771533, 991971, 1096389, 2314599, 2975913, 6943797, 20831391]

約数ペア:
[(1, 20831391), (3, 6943797), (7, 2975913), (9, 2314599), (19, 1096389), (21, 991971), (27, 771533), (57, 365463), (63, 330657), (133, 156627), (171, 121821), (189, 110219), (399, 52209), (513, 40607), (1197, 17403), (3591, 5801)]

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