16004000

素因数分解:

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

素因数の和:4026

約数の個数: 48

約数和(自身を含む): 39331656

約数和(自身を除く): 23327656

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 32, 40, 50, 80, 100, 125, 160, 200, 250, 400, 500, 800, 1000, 2000, 4000, 4001, 8002, 16004, 20005, 32008, 40010, 64016, 80020, 100025, 128032, 160040, 200050, 320080, 400100, 500125, 640160, 800200, 1000250, 1600400, 2000500, 3200800, 4001000, 8002000, 16004000]

約数ペア:

[(1, 16004000), (2, 8002000), (4, 4001000), (5, 3200800), (8, 2000500), (10, 1600400), (16, 1000250), (20, 800200), (25, 640160), (32, 500125), (40, 400100), (50, 320080), (80, 200050), (100, 160040), (125, 128032), (160, 100025), (200, 80020), (250, 64016), (400, 40010), (500, 32008), (800, 20005), (1000, 16004), (2000, 8002), (4000, 4001)]