19978162

素因数分解:

$2^1\times {\mathrm{17}}^1\times {\mathrm{137}}^1\times {\mathrm{4289}}^1$

素因数の和:4445

約数の個数: 16

約数和(自身を含む): 31969080

約数和(自身を除く): 11990918

約数列:

[1, 2, 17, 34, 137, 274, 2329, 4289, 4658, 8578, 72913, 145826, 587593, 1175186, 9989081, 19978162]

約数ペア:

[(1, 19978162), (2, 9989081), (17, 1175186), (34, 587593), (137, 145826), (274, 72913), (2329, 8578), (4289, 4658)]