81508400

素因数分解:

$2^4\times 5^2\times {\mathrm{203771}}^1$

素因数の和:203789

約数の個数: 30

約数和(自身を含む): 195824892

約数和(自身を除く): 114316492

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 203771, 407542, 815084, 1018855, 1630168, 2037710, 3260336, 4075420, 5094275, 8150840, 10188550, 16301680, 20377100, 40754200, 81508400]

約数ペア:

[(1, 81508400), (2, 40754200), (4, 20377100), (5, 16301680), (8, 10188550), (10, 8150840), (16, 5094275), (20, 4075420), (25, 3260336), (40, 2037710), (50, 1630168), (80, 1018855), (100, 815084), (200, 407542), (400, 203771)]