21086468

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31193}}^1$

素因数の和:31223

約数の個数: 18

約数和(自身を含む): 39959514

約数和(自身を除く): 18873046

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31193, 62386, 124772, 405509, 811018, 1622036, 5271617, 10543234, 21086468]

約数ペア:

[(1, 21086468), (2, 10543234), (4, 5271617), (13, 1622036), (26, 811018), (52, 405509), (169, 124772), (338, 62386), (676, 31193)]