28139090

素因数分解:

$2^1\times 5^1\times 7^1\times {\mathrm{401987}}^1$

素因数の和:402001

約数の個数: 16

約数和(自身を含む): 57886272

約数和(自身を除く): 29747182

約数列:

[1, 2, 5, 7, 10, 14, 35, 70, 401987, 803974, 2009935, 2813909, 4019870, 5627818, 14069545, 28139090]

約数ペア:

[(1, 28139090), (2, 14069545), (5, 5627818), (7, 4019870), (10, 2813909), (14, 2009935), (35, 803974), (70, 401987)]