28162790

素因数分解:

$2^1\times 5^1\times {\mathrm{139}}^1\times {\mathrm{20261}}^1$

素因数の和:20407

約数の個数: 16

約数和(自身を含む): 51060240

約数和(自身を除く): 22897450

約数列:

[1, 2, 5, 10, 139, 278, 695, 1390, 20261, 40522, 101305, 202610, 2816279, 5632558, 14081395, 28162790]

約数ペア:

[(1, 28162790), (2, 14081395), (5, 5632558), (10, 2816279), (139, 202610), (278, 101305), (695, 40522), (1390, 20261)]