1289000

素因数分解:

$2^3\times 5^3\times {\mathrm{1289}}^1$

素因数の和:1310

約数の個数: 32

約数和(自身を含む): 3018600

約数和(自身を除く): 1729600

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 1289, 2578, 5156, 6445, 10312, 12890, 25780, 32225, 51560, 64450, 128900, 161125, 257800, 322250, 644500, 1289000]

約数ペア:

[(1, 1289000), (2, 644500), (4, 322250), (5, 257800), (8, 161125), (10, 128900), (20, 64450), (25, 51560), (40, 32225), (50, 25780), (100, 12890), (125, 10312), (200, 6445), (250, 5156), (500, 2578), (1000, 1289)]