28721889

素因数分解:

$3^2\times 7^2\times {\mathrm{65129}}^1$

素因数の和:65149

約数の個数: 18

約数和(自身を含む): 48261330

約数和(自身を除く): 19539441

約数列:

[1, 3, 7, 9, 21, 49, 63, 147, 441, 65129, 195387, 455903, 586161, 1367709, 3191321, 4103127, 9573963, 28721889]

約数ペア:

[(1, 28721889), (3, 9573963), (7, 4103127), (9, 3191321), (21, 1367709), (49, 586161), (63, 455903), (147, 195387), (441, 65129)]