17981525

素因数分解:

$5^2\times {\mathrm{43}}^2\times {\mathrm{389}}^1$

素因数の和:485

約数の個数: 18

約数和(自身を含む): 22886370

約数和(自身を除く): 4904845

約数列:

[1, 5, 25, 43, 215, 389, 1075, 1849, 1945, 9245, 9725, 16727, 46225, 83635, 418175, 719261, 3596305, 17981525]

約数ペア:

[(1, 17981525), (5, 3596305), (25, 719261), (43, 418175), (215, 83635), (389, 46225), (1075, 16727), (1849, 9725), (1945, 9245)]