639236

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{647}}^1$

素因数の和:683

約数の個数: 24

約数和(自身を含む): 1270080

約数和(自身を除く): 630844

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 76, 247, 494, 647, 988, 1294, 2588, 8411, 12293, 16822, 24586, 33644, 49172, 159809, 319618, 639236]

約数ペア:

[(1, 639236), (2, 319618), (4, 159809), (13, 49172), (19, 33644), (26, 24586), (38, 16822), (52, 12293), (76, 8411), (247, 2588), (494, 1294), (647, 988)]