20389537

素因数分解:

$7^2\times {\mathrm{31}}^2\times {\mathrm{433}}^1$

素因数の和:509

約数の個数: 18

約数和(自身を含む): 24564834

約数和(自身を除く): 4175297

約数列:

[1, 7, 31, 49, 217, 433, 961, 1519, 3031, 6727, 13423, 21217, 47089, 93961, 416113, 657727, 2912791, 20389537]

約数ペア:

[(1, 20389537), (7, 2912791), (31, 657727), (49, 416113), (217, 93961), (433, 47089), (961, 21217), (1519, 13423), (3031, 6727)]