21037796

素因数分解:

$2^2\times {\mathrm{13}}^2\times {\mathrm{31121}}^1$

素因数の和:31151

約数の個数: 18

約数和(自身を含む): 39867282

約数和(自身を除く): 18829486

約数列:

[1, 2, 4, 13, 26, 52, 169, 338, 676, 31121, 62242, 124484, 404573, 809146, 1618292, 5259449, 10518898, 21037796]

約数ペア:

[(1, 21037796), (2, 10518898), (4, 5259449), (13, 1618292), (26, 809146), (52, 404573), (169, 124484), (338, 62242), (676, 31121)]