18986513

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{37}}^1\times {\mathrm{5639}}^1$

素因数の和:5696

約数の個数: 16

約数和(自身を含む): 24003840

約数和(自身を除く): 5017327

約数列:

[1, 7, 13, 37, 91, 259, 481, 3367, 5639, 39473, 73307, 208643, 513149, 1460501, 2712359, 18986513]

約数ペア:

[(1, 18986513), (7, 2712359), (13, 1460501), (37, 513149), (91, 208643), (259, 73307), (481, 39473), (3367, 5639)]