2578000

素因数分解:

$2^4\times 5^3\times {\mathrm{1289}}^1$

素因数の和:1312

約数の個数: 40

約数和(自身を含む): 6238440

約数和(自身を除く): 3660440

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 1289, 2000, 2578, 5156, 6445, 10312, 12890, 20624, 25780, 32225, 51560, 64450, 103120, 128900, 161125, 257800, 322250, 515600, 644500, 1289000, 2578000]

約数ペア:

[(1, 2578000), (2, 1289000), (4, 644500), (5, 515600), (8, 322250), (10, 257800), (16, 161125), (20, 128900), (25, 103120), (40, 64450), (50, 51560), (80, 32225), (100, 25780), (125, 20624), (200, 12890), (250, 10312), (400, 6445), (500, 5156), (1000, 2578), (1289, 2000)]