813648820

素因数分解:

$2^2\times 5^1\times {\mathrm{40682441}}^1$

素因数の和:40682450

約数の個数: 12

約数和(自身を含む): 1708662564

約数和(自身を除く): 895013744

約数列:

[1, 2, 4, 5, 10, 20, 40682441, 81364882, 162729764, 203412205, 406824410, 813648820]

約数ペア:

[(1, 813648820), (2, 406824410), (4, 203412205), (5, 162729764), (10, 81364882), (20, 40682441)]