6445000

素因数分解:

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

素因数の和:1315

約数の個数: 40

約数和(自身を含む): 15112350

約数和(自身を除く): 8667350

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 1289, 2500, 2578, 5000, 5156, 6445, 10312, 12890, 25780, 32225, 51560, 64450, 128900, 161125, 257800, 322250, 644500, 805625, 1289000, 1611250, 3222500, 6445000]

約数ペア:

[(1, 6445000), (2, 3222500), (4, 1611250), (5, 1289000), (8, 805625), (10, 644500), (20, 322250), (25, 257800), (40, 161125), (50, 128900), (100, 64450), (125, 51560), (200, 32225), (250, 25780), (500, 12890), (625, 10312), (1000, 6445), (1250, 5156), (1289, 5000), (2500, 2578)]