21000835443

素因数分解:

$3^1\times 7^1\times {\mathrm{127}}^1\times {\mathrm{7874329}}^1$

素因数の和:7874466

約数の個数: 16

約数和(自身を含む): 32253255680

約数和(自身を除く): 11252420237

約数列:

[1, 3, 7, 21, 127, 381, 889, 2667, 7874329, 23622987, 55120303, 165360909, 1000039783, 3000119349, 7000278481, 21000835443]

約数ペア:

[(1, 21000835443), (3, 7000278481), (7, 3000119349), (21, 1000039783), (127, 165360909), (381, 55120303), (889, 23622987), (2667, 7874329)]