21297619

素因数分解:

$7^1\times {\mathrm{103}}^1\times {\mathrm{109}}^1\times {\mathrm{271}}^1$

素因数の和:490

約数の個数: 16

約数和(自身を含む): 24893440

約数和(自身を除く): 3595821

約数列:

[1, 7, 103, 109, 271, 721, 763, 1897, 11227, 27913, 29539, 78589, 195391, 206773, 3042517, 21297619]

約数ペア:

[(1, 21297619), (7, 3042517), (103, 206773), (109, 195391), (271, 78589), (721, 29539), (763, 27913), (1897, 11227)]