39804579820

素因数分解:

$2^2\times 5^1\times {\mathrm{1990228991}}^1$

素因数の和:1990229000

約数の個数: 12

約数和(自身を含む): 83589617664

約数和(自身を除く): 43785037844

約数列:

[1, 2, 4, 5, 10, 20, 1990228991, 3980457982, 7960915964, 9951144955, 19902289910, 39804579820]

約数ペア:

[(1, 39804579820), (2, 19902289910), (4, 9951144955), (5, 7960915964), (10, 3980457982), (20, 1990228991)]