81171720

素因数分解:

$2^3\times 3^5\times 5^1\times 7^1\times {\mathrm{1193}}^1$

素因数の和:1226

約数の個数: 192

約数和(自身を含む): 312923520

約数和(自身を除く): 231751800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 54, 56, 60, 63, 70, 72, 81, 84, 90, 105, 108, 120, 126, 135, 140, 162, 168, 180, 189, 210, 216, 243, 252, 270, 280, 315, 324, 360, 378, 405, 420, 486, 504, 540, 567, 630, 648, 756, 810, 840, 945, 972, 1080, 1134, 1193, 1215, 1260, 1512, 1620, 1701, 1890, 1944, 2268, 2386, 2430, 2520, 2835, 3240, 3402, 3579, 3780, 4536, 4772, 4860, 5670, 5965, 6804, 7158, 7560, 8351, 8505, 9544, 9720, 10737, 11340, 11930, 13608, 14316, 16702, 17010, 17895, 21474, 22680, 23860, 25053, 28632, 32211, 33404, 34020, 35790, 41755, 42948, 47720, 50106, 53685, 64422, 66808, 68040, 71580, 75159, 83510, 85896, 96633, 100212, 107370, 125265, 128844, 143160, 150318, 161055, 167020, 193266, 200424, 214740, 225477, 250530, 257688, 289899, 300636, 322110, 334040, 375795, 386532, 429480, 450954, 483165, 501060, 579798, 601272, 644220, 676431, 751590, 773064, 901908, 966330, 1002120, 1127385, 1159596, 1288440, 1352862, 1449495, 1503180, 1803816, 1932660, 2029293, 2254770, 2319192, 2705724, 2898990, 3006360, 3382155, 3865320, 4058586, 4509540, 5411448, 5797980, 6764310, 8117172, 9019080, 10146465, 11595960, 13528620, 16234344, 20292930, 27057240, 40585860, 81171720]

約数ペア:

[(1, 81171720), (2, 40585860), (3, 27057240), (4, 20292930), (5, 16234344), (6, 13528620), (7, 11595960), (8, 10146465), (9, 9019080), (10, 8117172), (12, 6764310), (14, 5797980), (15, 5411448), (18, 4509540), (20, 4058586), (21, 3865320), (24, 3382155), (27, 3006360), (28, 2898990), (30, 2705724), (35, 2319192), (36, 2254770), (40, 2029293), (42, 1932660), (45, 1803816), (54, 1503180), (56, 1449495), (60, 1352862), (63, 1288440), (70, 1159596), (72, 1127385), (81, 1002120), (84, 966330), (90, 901908), (105, 773064), (108, 751590), (120, 676431), (126, 644220), (135, 601272), (140, 579798), (162, 501060), (168, 483165), (180, 450954), (189, 429480), (210, 386532), (216, 375795), (243, 334040), (252, 322110), (270, 300636), (280, 289899), (315, 257688), (324, 250530), (360, 225477), (378, 214740), (405, 200424), (420, 193266), (486, 167020), (504, 161055), (540, 150318), (567, 143160), (630, 128844), (648, 125265), (756, 107370), (810, 100212), (840, 96633), (945, 85896), (972, 83510), (1080, 75159), (1134, 71580), (1193, 68040), (1215, 66808), (1260, 64422), (1512, 53685), (1620, 50106), (1701, 47720), (1890, 42948), (1944, 41755), (2268, 35790), (2386, 34020), (2430, 33404), (2520, 32211), (2835, 28632), (3240, 25053), (3402, 23860), (3579, 22680), (3780, 21474), (4536, 17895), (4772, 17010), (4860, 16702), (5670, 14316), (5965, 13608), (6804, 11930), (7158, 11340), (7560, 10737), (8351, 9720), (8505, 9544)]