7984000

素因数分解:

$2^7\times 5^3\times {\mathrm{499}}^1$

素因数の和:528

約数の個数: 64

約数和(自身を含む): 19890000

約数和(自身を除く): 11906000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 64, 80, 100, 125, 128, 160, 200, 250, 320, 400, 499, 500, 640, 800, 998, 1000, 1600, 1996, 2000, 2495, 3200, 3992, 4000, 4990, 7984, 8000, 9980, 12475, 15968, 16000, 19960, 24950, 31936, 39920, 49900, 62375, 63872, 79840, 99800, 124750, 159680, 199600, 249500, 319360, 399200, 499000, 798400, 998000, 1596800, 1996000, 3992000, 7984000]

約数ペア:

[(1, 7984000), (2, 3992000), (4, 1996000), (5, 1596800), (8, 998000), (10, 798400), (16, 499000), (20, 399200), (25, 319360), (32, 249500), (40, 199600), (50, 159680), (64, 124750), (80, 99800), (100, 79840), (125, 63872), (128, 62375), (160, 49900), (200, 39920), (250, 31936), (320, 24950), (400, 19960), (499, 16000), (500, 15968), (640, 12475), (800, 9980), (998, 8000), (1000, 7984), (1600, 4990), (1996, 4000), (2000, 3992), (2495, 3200)]