21490456

素因数分解:

$2^3\times {\mathrm{13}}^1\times {\mathrm{206639}}^1$

素因数の和:206658

約数の個数: 16

約数和(自身を含む): 43394400

約数和(自身を除く): 21903944

約数列:

[1, 2, 4, 8, 13, 26, 52, 104, 206639, 413278, 826556, 1653112, 2686307, 5372614, 10745228, 21490456]

約数ペア:

[(1, 21490456), (2, 10745228), (4, 5372614), (8, 2686307), (13, 1653112), (26, 826556), (52, 413278), (104, 206639)]