80450000

素因数分解:

$2^4\times 5^5\times {\mathrm{1609}}^1$

素因数の和:1642

約数の個数: 60

約数和(自身を含む): 194948460

約数和(自身を除く): 114498460

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 125, 200, 250, 400, 500, 625, 1000, 1250, 1609, 2000, 2500, 3125, 3218, 5000, 6250, 6436, 8045, 10000, 12500, 12872, 16090, 25000, 25744, 32180, 40225, 50000, 64360, 80450, 128720, 160900, 201125, 321800, 402250, 643600, 804500, 1005625, 1609000, 2011250, 3218000, 4022500, 5028125, 8045000, 10056250, 16090000, 20112500, 40225000, 80450000]

約数ペア:

[(1, 80450000), (2, 40225000), (4, 20112500), (5, 16090000), (8, 10056250), (10, 8045000), (16, 5028125), (20, 4022500), (25, 3218000), (40, 2011250), (50, 1609000), (80, 1005625), (100, 804500), (125, 643600), (200, 402250), (250, 321800), (400, 201125), (500, 160900), (625, 128720), (1000, 80450), (1250, 64360), (1609, 50000), (2000, 40225), (2500, 32180), (3125, 25744), (3218, 25000), (5000, 16090), (6250, 12872), (6436, 12500), (8045, 10000)]