1780400

素因数分解:

$2^4\times 5^2\times {\mathrm{4451}}^1$

素因数の和:4469

約数の個数: 30

約数和(自身を含む): 4278372

約数和(自身を除く): 2497972

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 4451, 8902, 17804, 22255, 35608, 44510, 71216, 89020, 111275, 178040, 222550, 356080, 445100, 890200, 1780400]

約数ペア:

[(1, 1780400), (2, 890200), (4, 445100), (5, 356080), (8, 222550), (10, 178040), (16, 111275), (20, 89020), (25, 71216), (40, 44510), (50, 35608), (80, 22255), (100, 17804), (200, 8902), (400, 4451)]