28069209

素因数分解:

$3^2\times 7^2\times {\mathrm{63649}}^1$

素因数の和:63669

約数の個数: 18

約数和(自身を含む): 47164650

約数和(自身を除く): 19095441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 63649, 190947, 445543, 572841, 1336629, 3118801, 4009887, 9356403, 28069209]

約数ペア:

[(1, 28069209), (3, 9356403), (7, 4009887), (9, 3118801), (21, 1336629), (49, 572841), (63, 445543), (147, 190947), (441, 63649)]