19804000

素因数分解:

$2^5\times 5^3\times {\mathrm{4951}}^1$

素因数の和:4976

約数の個数: 48

約数和(自身を含む): 48668256

約数和(自身を除く): 28864256

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 4951, 9902, 19804, 24755, 39608, 49510, 79216, 99020, 123775, 158432, 198040, 247550, 396080, 495100, 618875, 792160, 990200, 1237750, 1980400, 2475500, 3960800, 4951000, 9902000, 19804000]

約数ペア:

[(1, 19804000), (2, 9902000), (4, 4951000), (5, 3960800), (8, 2475500), (10, 1980400), (16, 1237750), (20, 990200), (25, 792160), (32, 618875), (40, 495100), (50, 396080), (80, 247550), (100, 198040), (125, 158432), (160, 123775), (200, 99020), (250, 79216), (400, 49510), (500, 39608), (800, 24755), (1000, 19804), (2000, 9902), (4000, 4951)]