80005000

素因数分解:

$2^3\times 5^4\times {\mathrm{16001}}^1$

素因数の和:16027

約数の個数: 40

約数和(自身を含む): 187463430

約数和(自身を除く): 107458430

約数列:

[1, 2, 4, 5, 8, 10, 20, 25, 40, 50, 100, 125, 200, 250, 500, 625, 1000, 1250, 2500, 5000, 16001, 32002, 64004, 80005, 128008, 160010, 320020, 400025, 640040, 800050, 1600100, 2000125, 3200200, 4000250, 8000500, 10000625, 16001000, 20001250, 40002500, 80005000]

約数ペア:

[(1, 80005000), (2, 40002500), (4, 20001250), (5, 16001000), (8, 10000625), (10, 8000500), (20, 4000250), (25, 3200200), (40, 2000125), (50, 1600100), (100, 800050), (125, 640040), (200, 400025), (250, 320020), (500, 160010), (625, 128008), (1000, 80005), (1250, 64004), (2500, 32002), (5000, 16001)]