9998000

素因数分解:

$2^4\times 5^3\times {\mathrm{4999}}^1$

素因数の和:5022

約数の個数: 40

約数和(自身を含む): 24180000

約数和(自身を除く): 14182000

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 4999, 9998, 19996, 24995, 39992, 49990, 79984, 99980, 124975, 199960, 249950, 399920, 499900, 624875, 999800, 1249750, 1999600, 2499500, 4999000, 9998000]

約数ペア:

[(1, 9998000), (2, 4999000), (4, 2499500), (5, 1999600), (8, 1249750), (10, 999800), (16, 624875), (20, 499900), (25, 399920), (40, 249950), (50, 199960), (80, 124975), (100, 99980), (125, 79984), (200, 49990), (250, 39992), (400, 24995), (500, 19996), (1000, 9998), (2000, 4999)]