81697268960

素因数分解:

$2^5\times 5^1\times {\mathrm{71}}^2\times {\mathrm{199}}^1\times {\mathrm{509}}^1$

素因数の和:865

約数の個数: 144

約数和(自身を含む): 197136828000

約数和(自身を除く): 115439559040

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 71, 80, 142, 160, 199, 284, 355, 398, 509, 568, 710, 796, 995, 1018, 1136, 1420, 1592, 1990, 2036, 2272, 2545, 2840, 3184, 3980, 4072, 5041, 5090, 5680, 6368, 7960, 8144, 10082, 10180, 11360, 14129, 15920, 16288, 20164, 20360, 25205, 28258, 31840, 36139, 40328, 40720, 50410, 56516, 70645, 72278, 80656, 81440, 100820, 101291, 113032, 141290, 144556, 161312, 180695, 201640, 202582, 226064, 282580, 289112, 361390, 403280, 405164, 452128, 506455, 565160, 578224, 722780, 806560, 810328, 1003159, 1012910, 1130320, 1156448, 1445560, 1620656, 2006318, 2025820, 2260640, 2565869, 2891120, 3241312, 4012636, 4051640, 5015795, 5131738, 5782240, 7191661, 8025272, 8103280, 10031590, 10263476, 12829345, 14383322, 16050544, 16206560, 20063180, 20526952, 25658690, 28766644, 32101088, 35958305, 40126360, 41053904, 51317380, 57533288, 71916610, 80252720, 82107808, 102634760, 115066576, 143833220, 160505440, 205269520, 230133152, 287666440, 410539040, 510607931, 575332880, 1021215862, 1150665760, 2042431724, 2553039655, 4084863448, 5106079310, 8169726896, 10212158620, 16339453792, 20424317240, 40848634480, 81697268960]

約数ペア:

[(1, 81697268960), (2, 40848634480), (4, 20424317240), (5, 16339453792), (8, 10212158620), (10, 8169726896), (16, 5106079310), (20, 4084863448), (32, 2553039655), (40, 2042431724), (71, 1150665760), (80, 1021215862), (142, 575332880), (160, 510607931), (199, 410539040), (284, 287666440), (355, 230133152), (398, 205269520), (509, 160505440), (568, 143833220), (710, 115066576), (796, 102634760), (995, 82107808), (1018, 80252720), (1136, 71916610), (1420, 57533288), (1592, 51317380), (1990, 41053904), (2036, 40126360), (2272, 35958305), (2545, 32101088), (2840, 28766644), (3184, 25658690), (3980, 20526952), (4072, 20063180), (5041, 16206560), (5090, 16050544), (5680, 14383322), (6368, 12829345), (7960, 10263476), (8144, 10031590), (10082, 8103280), (10180, 8025272), (11360, 7191661), (14129, 5782240), (15920, 5131738), (16288, 5015795), (20164, 4051640), (20360, 4012636), (25205, 3241312), (28258, 2891120), (31840, 2565869), (36139, 2260640), (40328, 2025820), (40720, 2006318), (50410, 1620656), (56516, 1445560), (70645, 1156448), (72278, 1130320), (80656, 1012910), (81440, 1003159), (100820, 810328), (101291, 806560), (113032, 722780), (141290, 578224), (144556, 565160), (161312, 506455), (180695, 452128), (201640, 405164), (202582, 403280), (226064, 361390), (282580, 289112)]