81125821

素因数分解:

$7^2\times {\mathrm{43}}^1\times {\mathrm{139}}^1\times {\mathrm{277}}^1$

素因数の和:473

約数の個数: 24

約数和(自身を含む): 97611360

約数和(自身を除く): 16485539

約数列:

[1, 7, 43, 49, 139, 277, 301, 973, 1939, 2107, 5977, 6811, 11911, 13573, 38503, 41839, 83377, 269521, 292873, 583639, 1655629, 1886647, 11589403, 81125821]

約数ペア:

[(1, 81125821), (7, 11589403), (43, 1886647), (49, 1655629), (139, 583639), (277, 292873), (301, 269521), (973, 83377), (1939, 41839), (2107, 38503), (5977, 13573), (6811, 11911)]