19887844

素因数分解:

$2^2\times {\mathrm{43}}^2\times {\mathrm{2689}}^1$

素因数の和:2779

約数の個数: 18

約数和(自身を含む): 35645190

約数和(自身を除く): 15757346

約数列:

[1, 2, 4, 43, 86, 172, 1849, 2689, 3698, 5378, 7396, 10756, 115627, 231254, 462508, 4971961, 9943922, 19887844]

約数ペア:

[(1, 19887844), (2, 9943922), (4, 4971961), (43, 462508), (86, 231254), (172, 115627), (1849, 10756), (2689, 7396), (3698, 5378)]