About the Number

21021740

21021739 ← → 21021741

2進数表記:1010000001100010000101100

漢数字表記:二千百二万千七百四十

素因数分解:

2 2 × 5 1 × 109 1 × 9643 1

素因数の和:9761
約数の個数: 24
約数和(自身を含む): 44555280
約数和(自身を除く): 23533540

約数列:
[1, 2, 4, 5, 10, 20, 109, 218, 436, 545, 1090, 2180, 9643, 19286, 38572, 48215, 96430, 192860, 1051087, 2102174, 4204348, 5255435, 10510870, 21021740]

約数ペア:
[(1, 21021740), (2, 10510870), (4, 5255435), (5, 4204348), (10, 2102174), (20, 1051087), (109, 192860), (218, 96430), (436, 48215), (545, 38572), (1090, 19286), (2180, 9643)]

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