20518988

素因数分解:

$2^2\times 7^1\times {\mathrm{193}}^1\times {\mathrm{3797}}^1$

素因数の和:4001

約数の個数: 24

約数和(自身を含む): 41261472

約数和(自身を除く): 20742484

約数列:

[1, 2, 4, 7, 14, 28, 193, 386, 772, 1351, 2702, 3797, 5404, 7594, 15188, 26579, 53158, 106316, 732821, 1465642, 2931284, 5129747, 10259494, 20518988]

約数ペア:

[(1, 20518988), (2, 10259494), (4, 5129747), (7, 2931284), (14, 1465642), (28, 732821), (193, 106316), (386, 53158), (772, 26579), (1351, 15188), (2702, 7594), (3797, 5404)]