20811640

素因数分解:

$2^3\times 5^1\times {\mathrm{520291}}^1$

素因数の和:520302

約数の個数: 16

約数和(自身を含む): 46826280

約数和(自身を除く): 26014640

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 520291, 1040582, 2081164, 2601455, 4162328, 5202910, 10405820, 20811640]

約数ペア:

[(1, 20811640), (2, 10405820), (4, 5202910), (5, 4162328), (8, 2601455), (10, 2081164), (20, 1040582), (40, 520291)]