209311487

素因数分解:

$7^2\times {\mathrm{11}}^2\times {\mathrm{43}}^1\times {\mathrm{821}}^1$

素因数の和:900

約数の個数: 36

約数和(自身を含む): 274189608

約数和(自身を除く): 64878121

約数列:

[1, 7, 11, 43, 49, 77, 121, 301, 473, 539, 821, 847, 2107, 3311, 5203, 5747, 5929, 9031, 23177, 35303, 36421, 40229, 63217, 99341, 247121, 254947, 388333, 442519, 695387, 1729847, 2718331, 4271663, 4867709, 19028317, 29901641, 209311487]

約数ペア:

[(1, 209311487), (7, 29901641), (11, 19028317), (43, 4867709), (49, 4271663), (77, 2718331), (121, 1729847), (301, 695387), (473, 442519), (539, 388333), (821, 254947), (847, 247121), (2107, 99341), (3311, 63217), (5203, 40229), (5747, 36421), (5929, 35303), (9031, 23177)]