19915511

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{3359}}^1$

素因数の和:3395

約数の個数: 18

約数和(自身を含む): 25472160

約数和(自身を除く): 5556649

約数列:

[1, 7, 11, 49, 77, 121, 539, 847, 3359, 5929, 23513, 36949, 164591, 258643, 406439, 1810501, 2845073, 19915511]

約数ペア:

[(1, 19915511), (7, 2845073), (11, 1810501), (49, 406439), (77, 258643), (121, 164591), (539, 36949), (847, 23513), (3359, 5929)]