80005640

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{71}}^1\times {\mathrm{197}}^1$

素因数の和:303

約数の個数: 128

約数和(自身を含む): 215550720

約数和(自身を除く): 135545080

約数列:

[1, 2, 4, 5, 8, 10, 11, 13, 20, 22, 26, 40, 44, 52, 55, 65, 71, 88, 104, 110, 130, 142, 143, 197, 220, 260, 284, 286, 355, 394, 440, 520, 568, 572, 710, 715, 781, 788, 923, 985, 1144, 1420, 1430, 1562, 1576, 1846, 1970, 2167, 2561, 2840, 2860, 3124, 3692, 3905, 3940, 4334, 4615, 5122, 5720, 6248, 7384, 7810, 7880, 8668, 9230, 10153, 10244, 10835, 12805, 13987, 15620, 17336, 18460, 20306, 20488, 21670, 25610, 27974, 28171, 31240, 36920, 40612, 43340, 50765, 51220, 55948, 56342, 69935, 81224, 86680, 101530, 102440, 111896, 112684, 139870, 140855, 153857, 181831, 203060, 225368, 279740, 281710, 307714, 363662, 406120, 559480, 563420, 615428, 727324, 769285, 909155, 1126840, 1230856, 1454648, 1538570, 1818310, 2000141, 3077140, 3636620, 4000282, 6154280, 7273240, 8000564, 10000705, 16001128, 20001410, 40002820, 80005640]

約数ペア:

[(1, 80005640), (2, 40002820), (4, 20001410), (5, 16001128), (8, 10000705), (10, 8000564), (11, 7273240), (13, 6154280), (20, 4000282), (22, 3636620), (26, 3077140), (40, 2000141), (44, 1818310), (52, 1538570), (55, 1454648), (65, 1230856), (71, 1126840), (88, 909155), (104, 769285), (110, 727324), (130, 615428), (142, 563420), (143, 559480), (197, 406120), (220, 363662), (260, 307714), (284, 281710), (286, 279740), (355, 225368), (394, 203060), (440, 181831), (520, 153857), (568, 140855), (572, 139870), (710, 112684), (715, 111896), (781, 102440), (788, 101530), (923, 86680), (985, 81224), (1144, 69935), (1420, 56342), (1430, 55948), (1562, 51220), (1576, 50765), (1846, 43340), (1970, 40612), (2167, 36920), (2561, 31240), (2840, 28171), (2860, 27974), (3124, 25610), (3692, 21670), (3905, 20488), (3940, 20306), (4334, 18460), (4615, 17336), (5122, 15620), (5720, 13987), (6248, 12805), (7384, 10835), (7810, 10244), (7880, 10153), (8668, 9230)]