21491336

素因数分解:

$2^3\times {\mathrm{131}}^1\times {\mathrm{20507}}^1$

素因数の和:20644

約数の個数: 16

約数和(自身を含む): 40605840

約数和(自身を除く): 19114504

約数列:

[1, 2, 4, 8, 131, 262, 524, 1048, 20507, 41014, 82028, 164056, 2686417, 5372834, 10745668, 21491336]

約数ペア:

[(1, 21491336), (2, 10745668), (4, 5372834), (8, 2686417), (131, 164056), (262, 82028), (524, 41014), (1048, 20507)]