12978987

素因数分解:

$3^1\times 7^1\times {\mathrm{31}}^1\times {\mathrm{19937}}^1$

素因数の和:19978

約数の個数: 16

約数和(自身を含む): 20416512

約数和(自身を除く): 7437525

約数列:

[1, 3, 7, 21, 31, 93, 217, 651, 19937, 59811, 139559, 418677, 618047, 1854141, 4326329, 12978987]

約数ペア:

[(1, 12978987), (3, 4326329), (7, 1854141), (21, 618047), (31, 418677), (93, 139559), (217, 59811), (651, 19937)]