128257240

素因数分解:

$2^3\times 5^1\times {\mathrm{71}}^1\times {\mathrm{45161}}^1$

素因数の和:45243

約数の個数: 32

約数和(自身を含む): 292649760

約数和(自身を除く): 164392520

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 71, 142, 284, 355, 568, 710, 1420, 2840, 45161, 90322, 180644, 225805, 361288, 451610, 903220, 1806440, 3206431, 6412862, 12825724, 16032155, 25651448, 32064310, 64128620, 128257240]

約数ペア:

[(1, 128257240), (2, 64128620), (4, 32064310), (5, 25651448), (8, 16032155), (10, 12825724), (20, 6412862), (40, 3206431), (71, 1806440), (142, 903220), (284, 451610), (355, 361288), (568, 225805), (710, 180644), (1420, 90322), (2840, 45161)]