8002000

素因数分解:

$2^4\times 5^3\times {\mathrm{4001}}^1$

素因数の和:4024

約数の個数: 40

約数和(自身を含む): 19353672

約数和(自身を除く): 11351672

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 1000, 2000, 4001, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 100025, 160040, 200050, 320080, 400100, 500125, 800200, 1000250, 1600400, 2000500, 4001000, 8002000]

約数ペア:

[(1, 8002000), (2, 4001000), (4, 2000500), (5, 1600400), (8, 1000250), (10, 800200), (16, 500125), (20, 400100), (25, 320080), (40, 200050), (50, 160040), (80, 100025), (100, 80020), (125, 64016), (200, 40010), (250, 32008), (400, 20005), (500, 16004), (1000, 8002), (2000, 4001)]