21020900

素因数分解:

$2^2\times 5^2\times {\mathrm{210209}}^1$

素因数の和:210223

約数の個数: 18

約数和(自身を含む): 45615570

約数和(自身を除く): 24594670

約数列:

[1, 2, 4, 5, 10, 20, 25, 50, 100, 210209, 420418, 840836, 1051045, 2102090, 4204180, 5255225, 10510450, 21020900]

約数ペア:

[(1, 21020900), (2, 10510450), (4, 5255225), (5, 4204180), (10, 2102090), (20, 1051045), (25, 840836), (50, 420418), (100, 210209)]