21951212

素因数分解:

$2^2\times {\mathrm{37}}^1\times {\mathrm{71}}^1\times {\mathrm{2089}}^1$

素因数の和:2201

約数の個数: 24

約数和(自身を含む): 40027680

約数和(自身を除く): 18076468

約数列:

[1, 2, 4, 37, 71, 74, 142, 148, 284, 2089, 2627, 4178, 5254, 8356, 10508, 77293, 148319, 154586, 296638, 309172, 593276, 5487803, 10975606, 21951212]

約数ペア:

[(1, 21951212), (2, 10975606), (4, 5487803), (37, 593276), (71, 309172), (74, 296638), (142, 154586), (148, 148319), (284, 77293), (2089, 10508), (2627, 8356), (4178, 5254)]