19955984

素因数分解:

$2^4\times {\mathrm{53}}^1\times {\mathrm{101}}^1\times {\mathrm{233}}^1$

素因数の和:395

約数の個数: 40

約数和(自身を含む): 39955032

約数和(自身を除く): 19999048

約数列:

[1, 2, 4, 8, 16, 53, 101, 106, 202, 212, 233, 404, 424, 466, 808, 848, 932, 1616, 1864, 3728, 5353, 10706, 12349, 21412, 23533, 24698, 42824, 47066, 49396, 85648, 94132, 98792, 188264, 197584, 376528, 1247249, 2494498, 4988996, 9977992, 19955984]

約数ペア:

[(1, 19955984), (2, 9977992), (4, 4988996), (8, 2494498), (16, 1247249), (53, 376528), (101, 197584), (106, 188264), (202, 98792), (212, 94132), (233, 85648), (404, 49396), (424, 47066), (466, 42824), (808, 24698), (848, 23533), (932, 21412), (1616, 12349), (1864, 10706), (3728, 5353)]