21240400

素因数分解:

$2^4\times 5^2\times {\mathrm{53101}}^1$

素因数の和:53119

約数の個数: 30

約数和(自身を含む): 51031022

約数和(自身を除く): 29790622

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 200, 400, 53101, 106202, 212404, 265505, 424808, 531010, 849616, 1062020, 1327525, 2124040, 2655050, 4248080, 5310100, 10620200, 21240400]

約数ペア:

[(1, 21240400), (2, 10620200), (4, 5310100), (5, 4248080), (8, 2655050), (10, 2124040), (16, 1327525), (20, 1062020), (25, 849616), (40, 531010), (50, 424808), (80, 265505), (100, 212404), (200, 106202), (400, 53101)]