19917557

素因数分解:

${\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{2477}}^1$

素因数の和:2548

約数の個数: 16

約数和(自身を含む): 23550912

約数和(自身を除く): 3633355

約数列:

[1, 11, 17, 43, 187, 473, 731, 2477, 8041, 27247, 42109, 106511, 463199, 1171621, 1810687, 19917557]

約数ペア:

[(1, 19917557), (11, 1810687), (17, 1171621), (43, 463199), (187, 106511), (473, 42109), (731, 27247), (2477, 8041)]