4990000

素因数分解:

$2^4\times 5^4\times {\mathrm{499}}^1$

素因数の和:527

約数の個数: 50

約数和(自身を含む): 12105500

約数和(自身を除く): 7115500

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 499, 500, 625, 998, 1000, 1250, 1996, 2000, 2495, 2500, 3992, 4990, 5000, 7984, 9980, 10000, 12475, 19960, 24950, 39920, 49900, 62375, 99800, 124750, 199600, 249500, 311875, 499000, 623750, 998000, 1247500, 2495000, 4990000]

約数ペア:

[(1, 4990000), (2, 2495000), (4, 1247500), (5, 998000), (8, 623750), (10, 499000), (16, 311875), (20, 249500), (25, 199600), (40, 124750), (50, 99800), (80, 62375), (100, 49900), (125, 39920), (200, 24950), (250, 19960), (400, 12475), (499, 10000), (500, 9980), (625, 7984), (998, 5000), (1000, 4990), (1250, 3992), (1996, 2500), (2000, 2495)]