28386790

素因数分解:

$2^1\times 5^1\times {\mathrm{401}}^1\times {\mathrm{7079}}^1$

素因数の和:7487

約数の個数: 16

約数和(自身を含む): 51230880

約数和(自身を除く): 22844090

約数列:

[1, 2, 5, 10, 401, 802, 2005, 4010, 7079, 14158, 35395, 70790, 2838679, 5677358, 14193395, 28386790]

約数ペア:

[(1, 28386790), (2, 14193395), (5, 5677358), (10, 2838679), (401, 70790), (802, 35395), (2005, 14158), (4010, 7079)]