18991964

素因数分解:

$2^2\times {\mathrm{31}}^1\times {\mathrm{103}}^1\times {\mathrm{1487}}^1$

素因数の和:1625

約数の個数: 24

約数和(自身を含む): 34664448

約数和(自身を除く): 15672484

約数列:

[1, 2, 4, 31, 62, 103, 124, 206, 412, 1487, 2974, 3193, 5948, 6386, 12772, 46097, 92194, 153161, 184388, 306322, 612644, 4747991, 9495982, 18991964]

約数ペア:

[(1, 18991964), (2, 9495982), (4, 4747991), (31, 612644), (62, 306322), (103, 184388), (124, 153161), (206, 92194), (412, 46097), (1487, 12772), (2974, 6386), (3193, 5948)]