19780138

素因数分解:

$2^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{47}}^1\times {\mathrm{1307}}^1$

素因数の和:1386

約数の個数: 32

約数和(自身を含む): 36163584

約数和(自身を除く): 16383446

約数列:

[1, 2, 7, 14, 23, 46, 47, 94, 161, 322, 329, 658, 1081, 1307, 2162, 2614, 7567, 9149, 15134, 18298, 30061, 60122, 61429, 122858, 210427, 420854, 430003, 860006, 1412867, 2825734, 9890069, 19780138]

約数ペア:

[(1, 19780138), (2, 9890069), (7, 2825734), (14, 1412867), (23, 860006), (46, 430003), (47, 420854), (94, 210427), (161, 122858), (322, 61429), (329, 60122), (658, 30061), (1081, 18298), (1307, 15134), (2162, 9149), (2614, 7567)]