18987241

素因数分解:

$7^1\times {\mathrm{13}}^1\times {\mathrm{137}}^1\times {\mathrm{1523}}^1$

素因数の和:1680

約数の個数: 16

約数和(自身を含む): 23554944

約数和(自身を除く): 4567703

約数列:

[1, 7, 13, 91, 137, 959, 1523, 1781, 10661, 12467, 19799, 138593, 208651, 1460557, 2712463, 18987241]

約数ペア:

[(1, 18987241), (7, 2712463), (13, 1460557), (91, 208651), (137, 138593), (959, 19799), (1523, 12467), (1781, 10661)]