256939921

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{43}}^1\times {\mathrm{149}}^1\times {\mathrm{337}}^1$

素因数の和:553

約数の個数: 32

約数和(自身を含む): 321235200

約数和(自身を除く): 64295279

約数列:

[1, 7, 17, 43, 119, 149, 301, 337, 731, 1043, 2359, 2533, 5117, 5729, 6407, 14491, 17731, 40103, 44849, 50213, 101437, 108919, 246347, 351491, 762433, 853621, 1724429, 2159159, 5975347, 15114113, 36705703, 256939921]

約数ペア:

[(1, 256939921), (7, 36705703), (17, 15114113), (43, 5975347), (119, 2159159), (149, 1724429), (301, 853621), (337, 762433), (731, 351491), (1043, 246347), (2359, 108919), (2533, 101437), (5117, 50213), (5729, 44849), (6407, 40103), (14491, 17731)]