About the Number

490000

489999 ← → 490001

2進数表記:1110111101000010000

漢数字表記:四十九万

素因数分解:

2 4 × 5 4 × 7 2

素因数の和:42
約数の個数: 75
約数和(自身を含む): 1380027
約数和(自身を除く): 890027

約数列:
[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 25, 28, 35, 40, 49, 50, 56, 70, 80, 98, 100, 112, 125, 140, 175, 196, 200, 245, 250, 280, 350, 392, 400, 490, 500, 560, 625, 700, 784, 875, 980, 1000, 1225, 1250, 1400, 1750, 1960, 2000, 2450, 2500, 2800, 3500, 3920, 4375, 4900, 5000, 6125, 7000, 8750, 9800, 10000, 12250, 14000, 17500, 19600, 24500, 30625, 35000, 49000, 61250, 70000, 98000, 122500, 245000, 490000]

約数ペア:
[(1, 490000), (2, 245000), (4, 122500), (5, 98000), (7, 70000), (8, 61250), (10, 49000), (14, 35000), (16, 30625), (20, 24500), (25, 19600), (28, 17500), (35, 14000), (40, 12250), (49, 10000), (50, 9800), (56, 8750), (70, 7000), (80, 6125), (98, 5000), (100, 4900), (112, 4375), (125, 3920), (140, 3500), (175, 2800), (196, 2500), (200, 2450), (245, 2000), (250, 1960), (280, 1750), (350, 1400), (392, 1250), (400, 1225), (490, 1000), (500, 980), (560, 875), (625, 784)]

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