640437497

素因数分解:

$7^2\times {\mathrm{193}}^1\times {\mathrm{241}}^1\times {\mathrm{281}}^1$

素因数の和:729

約数の個数: 24

約数和(自身を含む): 754642152

約数和(自身を除く): 114204655

約数列:

[1, 7, 49, 193, 241, 281, 1351, 1687, 1967, 9457, 11809, 13769, 46513, 54233, 67721, 325591, 379631, 474047, 2279137, 2657417, 3318329, 13070153, 91491071, 640437497]

約数ペア:

[(1, 640437497), (7, 91491071), (49, 13070153), (193, 3318329), (241, 2657417), (281, 2279137), (1351, 474047), (1687, 379631), (1967, 325591), (9457, 67721), (11809, 54233), (13769, 46513)]