21080494084

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{405394117}}^1$

素因数の和:405394134

約数の個数: 12

約数和(自身を含む): 39728623564

約数和(自身を除く): 18648129480

約数列:

[1, 2, 4, 13, 26, 52, 405394117, 810788234, 1621576468, 5270123521, 10540247042, 21080494084]

約数ペア:

[(1, 21080494084), (2, 10540247042), (4, 5270123521), (13, 1621576468), (26, 810788234), (52, 405394117)]