About the Number

21001880

21001879 ← → 21001881

2進数表記:1010000000111011010011000

漢数字表記:二千百万千八百八十

素因数分解:

2 3 × 5 1 × 31 1 × 16937 1

素因数の和:16979
約数の個数: 32
約数和(自身を含む): 48781440
約数和(自身を除く): 27779560

約数列:
[1, 2, 4, 5, 8, 10, 20, 31, 40, 62, 124, 155, 248, 310, 620, 1240, 16937, 33874, 67748, 84685, 135496, 169370, 338740, 525047, 677480, 1050094, 2100188, 2625235, 4200376, 5250470, 10500940, 21001880]

約数ペア:
[(1, 21001880), (2, 10500940), (4, 5250470), (5, 4200376), (8, 2625235), (10, 2100188), (20, 1050094), (31, 677480), (40, 525047), (62, 338740), (124, 169370), (155, 135496), (248, 84685), (310, 67748), (620, 33874), (1240, 16937)]

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