81115020

素因数分解:

$2^2\times 3^4\times 5^1\times 7^1\times {\mathrm{23}}^1\times {\mathrm{311}}^1$

素因数の和:362

約数の個数: 240

約数和(自身を含む): 304432128

約数和(自身を除く): 223317108

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 12, 14, 15, 18, 20, 21, 23, 27, 28, 30, 35, 36, 42, 45, 46, 54, 60, 63, 69, 70, 81, 84, 90, 92, 105, 108, 115, 126, 135, 138, 140, 161, 162, 180, 189, 207, 210, 230, 252, 270, 276, 311, 315, 322, 324, 345, 378, 405, 414, 420, 460, 483, 540, 567, 621, 622, 630, 644, 690, 756, 805, 810, 828, 933, 945, 966, 1035, 1134, 1242, 1244, 1260, 1380, 1449, 1555, 1610, 1620, 1863, 1866, 1890, 1932, 2070, 2177, 2268, 2415, 2484, 2799, 2835, 2898, 3105, 3110, 3220, 3726, 3732, 3780, 4140, 4347, 4354, 4665, 4830, 5598, 5670, 5796, 6210, 6220, 6531, 7153, 7245, 7452, 8397, 8694, 8708, 9315, 9330, 9660, 10885, 11196, 11340, 12420, 13041, 13062, 13995, 14306, 14490, 16794, 17388, 18630, 18660, 19593, 21459, 21735, 21770, 25191, 26082, 26124, 27990, 28612, 28980, 32655, 33588, 35765, 37260, 39186, 41985, 42918, 43470, 43540, 50071, 50382, 52164, 55980, 58779, 64377, 65205, 65310, 71530, 78372, 83970, 85836, 86940, 97965, 100142, 100764, 107295, 117558, 125955, 128754, 130410, 130620, 143060, 150213, 167940, 176337, 193131, 195930, 200284, 214590, 235116, 250355, 251910, 257508, 260820, 293895, 300426, 321885, 352674, 386262, 391860, 429180, 450639, 500710, 503820, 579393, 587790, 600852, 643770, 705348, 751065, 772524, 881685, 901278, 965655, 1001420, 1158786, 1175580, 1287540, 1351917, 1502130, 1763370, 1802556, 1931310, 2253195, 2317572, 2703834, 2896965, 3004260, 3526740, 3862620, 4055751, 4506390, 5407668, 5793930, 6759585, 8111502, 9012780, 11587860, 13519170, 16223004, 20278755, 27038340, 40557510, 81115020]

約数ペア:

[(1, 81115020), (2, 40557510), (3, 27038340), (4, 20278755), (5, 16223004), (6, 13519170), (7, 11587860), (9, 9012780), (10, 8111502), (12, 6759585), (14, 5793930), (15, 5407668), (18, 4506390), (20, 4055751), (21, 3862620), (23, 3526740), (27, 3004260), (28, 2896965), (30, 2703834), (35, 2317572), (36, 2253195), (42, 1931310), (45, 1802556), (46, 1763370), (54, 1502130), (60, 1351917), (63, 1287540), (69, 1175580), (70, 1158786), (81, 1001420), (84, 965655), (90, 901278), (92, 881685), (105, 772524), (108, 751065), (115, 705348), (126, 643770), (135, 600852), (138, 587790), (140, 579393), (161, 503820), (162, 500710), (180, 450639), (189, 429180), (207, 391860), (210, 386262), (230, 352674), (252, 321885), (270, 300426), (276, 293895), (311, 260820), (315, 257508), (322, 251910), (324, 250355), (345, 235116), (378, 214590), (405, 200284), (414, 195930), (420, 193131), (460, 176337), (483, 167940), (540, 150213), (567, 143060), (621, 130620), (622, 130410), (630, 128754), (644, 125955), (690, 117558), (756, 107295), (805, 100764), (810, 100142), (828, 97965), (933, 86940), (945, 85836), (966, 83970), (1035, 78372), (1134, 71530), (1242, 65310), (1244, 65205), (1260, 64377), (1380, 58779), (1449, 55980), (1555, 52164), (1610, 50382), (1620, 50071), (1863, 43540), (1866, 43470), (1890, 42918), (1932, 41985), (2070, 39186), (2177, 37260), (2268, 35765), (2415, 33588), (2484, 32655), (2799, 28980), (2835, 28612), (2898, 27990), (3105, 26124), (3110, 26082), (3220, 25191), (3726, 21770), (3732, 21735), (3780, 21459), (4140, 19593), (4347, 18660), (4354, 18630), (4665, 17388), (4830, 16794), (5598, 14490), (5670, 14306), (5796, 13995), (6210, 13062), (6220, 13041), (6531, 12420), (7153, 11340), (7245, 11196), (7452, 10885), (8397, 9660), (8694, 9330), (8708, 9315)]