259999480

素因数分解:

$2^3\times 5^1\times {\mathrm{13}}^1\times {\mathrm{31}}^1\times {\mathrm{127}}^2$

素因数の和:309

約数の個数: 96

約数和(自身を含む): 655482240

約数和(自身を除く): 395482760

約数列:

[1, 2, 4, 5, 8, 10, 13, 20, 26, 31, 40, 52, 62, 65, 104, 124, 127, 130, 155, 248, 254, 260, 310, 403, 508, 520, 620, 635, 806, 1016, 1240, 1270, 1612, 1651, 2015, 2540, 3224, 3302, 3937, 4030, 5080, 6604, 7874, 8060, 8255, 13208, 15748, 16120, 16129, 16510, 19685, 31496, 32258, 33020, 39370, 51181, 64516, 66040, 78740, 80645, 102362, 129032, 157480, 161290, 204724, 209677, 255905, 322580, 409448, 419354, 499999, 511810, 645160, 838708, 999998, 1023620, 1048385, 1677416, 1999996, 2047240, 2096770, 2499995, 3999992, 4193540, 4999990, 6499987, 8387080, 9999980, 12999974, 19999960, 25999948, 32499935, 51999896, 64999870, 129999740, 259999480]

約数ペア:

[(1, 259999480), (2, 129999740), (4, 64999870), (5, 51999896), (8, 32499935), (10, 25999948), (13, 19999960), (20, 12999974), (26, 9999980), (31, 8387080), (40, 6499987), (52, 4999990), (62, 4193540), (65, 3999992), (104, 2499995), (124, 2096770), (127, 2047240), (130, 1999996), (155, 1677416), (248, 1048385), (254, 1023620), (260, 999998), (310, 838708), (403, 645160), (508, 511810), (520, 499999), (620, 419354), (635, 409448), (806, 322580), (1016, 255905), (1240, 209677), (1270, 204724), (1612, 161290), (1651, 157480), (2015, 129032), (2540, 102362), (3224, 80645), (3302, 78740), (3937, 66040), (4030, 64516), (5080, 51181), (6604, 39370), (7874, 33020), (8060, 32258), (8255, 31496), (13208, 19685), (15748, 16510), (16120, 16129)]