19999538

素因数分解:

$2^1\times {\mathrm{13}}^1\times {\mathrm{109}}^1\times {\mathrm{7057}}^1$

素因数の和:7181

約数の個数: 16

約数和(自身を含む): 32607960

約数和(自身を除く): 12608422

約数列:

[1, 2, 13, 26, 109, 218, 1417, 2834, 7057, 14114, 91741, 183482, 769213, 1538426, 9999769, 19999538]

約数ペア:

[(1, 19999538), (2, 9999769), (13, 1538426), (26, 769213), (109, 183482), (218, 91741), (1417, 14114), (2834, 7057)]