21905181

素因数分解:

$3^3\times {\mathrm{67}}^1\times {\mathrm{12109}}^1$

素因数の和:12185

約数の個数: 16

約数和(自身を含む): 32939200

約数和(自身を除く): 11034019

約数列:

[1, 3, 9, 27, 67, 201, 603, 1809, 12109, 36327, 108981, 326943, 811303, 2433909, 7301727, 21905181]

約数ペア:

[(1, 21905181), (3, 7301727), (9, 2433909), (27, 811303), (67, 326943), (201, 108981), (603, 36327), (1809, 12109)]