8999000

素因数分解:

$2^3\times 5^3\times {\mathrm{8999}}^1$

素因数の和:9020

約数の個数: 32

約数和(自身を含む): 21060000

約数和(自身を除く): 12061000

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 1000, 8999, 17998, 35996, 44995, 71992, 89990, 179980, 224975, 359960, 449950, 899900, 1124875, 1799800, 2249750, 4499500, 8999000]

約数ペア:

[(1, 8999000), (2, 4499500), (4, 2249750), (5, 1799800), (8, 1124875), (10, 899900), (20, 449950), (25, 359960), (40, 224975), (50, 179980), (100, 89990), (125, 71992), (200, 44995), (250, 35996), (500, 17998), (1000, 8999)]