21126508

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{3797}}^1$

素因数の和:3921

約数の個数: 24

約数和(自身を含む): 40198032

約数和(自身を除く): 19071524

約数列:

[1, 2, 4, 13, 26, 52, 107, 214, 428, 1391, 2782, 3797, 5564, 7594, 15188, 49361, 98722, 197444, 406279, 812558, 1625116, 5281627, 10563254, 21126508]

約数ペア:

[(1, 21126508), (2, 10563254), (4, 5281627), (13, 1625116), (26, 812558), (52, 406279), (107, 197444), (214, 98722), (428, 49361), (1391, 15188), (2782, 7594), (3797, 5564)]