640371960

素因数分解:

$2^3\times 3^3\times 5^1\times {\mathrm{31}}^2\times {\mathrm{617}}^1$

素因数の和:699

約数の個数: 192

約数和(自身を含む): 2209226400

約数和(自身を除く): 1568854440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 18, 20, 24, 27, 30, 31, 36, 40, 45, 54, 60, 62, 72, 90, 93, 108, 120, 124, 135, 155, 180, 186, 216, 248, 270, 279, 310, 360, 372, 465, 540, 558, 617, 620, 744, 837, 930, 961, 1080, 1116, 1234, 1240, 1395, 1674, 1851, 1860, 1922, 2232, 2468, 2790, 2883, 3085, 3348, 3702, 3720, 3844, 4185, 4805, 4936, 5553, 5580, 5766, 6170, 6696, 7404, 7688, 8370, 8649, 9255, 9610, 11106, 11160, 11532, 12340, 14415, 14808, 16659, 16740, 17298, 18510, 19127, 19220, 22212, 23064, 24680, 25947, 27765, 28830, 33318, 33480, 34596, 37020, 38254, 38440, 43245, 44424, 51894, 55530, 57381, 57660, 66636, 69192, 74040, 76508, 83295, 86490, 95635, 103788, 111060, 114762, 115320, 129735, 133272, 153016, 166590, 172143, 172980, 191270, 207576, 222120, 229524, 259470, 286905, 333180, 344286, 345960, 382540, 459048, 516429, 518940, 573810, 592937, 666360, 688572, 765080, 860715, 1032858, 1037880, 1147620, 1185874, 1377144, 1721430, 1778811, 2065716, 2295240, 2371748, 2582145, 2964685, 3442860, 3557622, 4131432, 4743496, 5164290, 5336433, 5929370, 6885720, 7115244, 8894055, 10328580, 10672866, 11858740, 14230488, 16009299, 17788110, 20657160, 21345732, 23717480, 26682165, 32018598, 35576220, 42691464, 53364330, 64037196, 71152440, 80046495, 106728660, 128074392, 160092990, 213457320, 320185980, 640371960]

約数ペア:

[(1, 640371960), (2, 320185980), (3, 213457320), (4, 160092990), (5, 128074392), (6, 106728660), (8, 80046495), (9, 71152440), (10, 64037196), (12, 53364330), (15, 42691464), (18, 35576220), (20, 32018598), (24, 26682165), (27, 23717480), (30, 21345732), (31, 20657160), (36, 17788110), (40, 16009299), (45, 14230488), (54, 11858740), (60, 10672866), (62, 10328580), (72, 8894055), (90, 7115244), (93, 6885720), (108, 5929370), (120, 5336433), (124, 5164290), (135, 4743496), (155, 4131432), (180, 3557622), (186, 3442860), (216, 2964685), (248, 2582145), (270, 2371748), (279, 2295240), (310, 2065716), (360, 1778811), (372, 1721430), (465, 1377144), (540, 1185874), (558, 1147620), (617, 1037880), (620, 1032858), (744, 860715), (837, 765080), (930, 688572), (961, 666360), (1080, 592937), (1116, 573810), (1234, 518940), (1240, 516429), (1395, 459048), (1674, 382540), (1851, 345960), (1860, 344286), (1922, 333180), (2232, 286905), (2468, 259470), (2790, 229524), (2883, 222120), (3085, 207576), (3348, 191270), (3702, 172980), (3720, 172143), (3844, 166590), (4185, 153016), (4805, 133272), (4936, 129735), (5553, 115320), (5580, 114762), (5766, 111060), (6170, 103788), (6696, 95635), (7404, 86490), (7688, 83295), (8370, 76508), (8649, 74040), (9255, 69192), (9610, 66636), (11106, 57660), (11160, 57381), (11532, 55530), (12340, 51894), (14415, 44424), (14808, 43245), (16659, 38440), (16740, 38254), (17298, 37020), (18510, 34596), (19127, 33480), (19220, 33318), (22212, 28830), (23064, 27765), (24680, 25947)]