20181280

素因数分解:

$2^5\times 5^1\times 7^1\times {\mathrm{37}}^1\times {\mathrm{487}}^1$

素因数の和:546

約数の個数: 96

約数和(自身を含む): 56077056

約数和(自身を除く): 35895776

約数列:

[1, 2, 4, 5, 7, 8, 10, 14, 16, 20, 28, 32, 35, 37, 40, 56, 70, 74, 80, 112, 140, 148, 160, 185, 224, 259, 280, 296, 370, 487, 518, 560, 592, 740, 974, 1036, 1120, 1184, 1295, 1480, 1948, 2072, 2435, 2590, 2960, 3409, 3896, 4144, 4870, 5180, 5920, 6818, 7792, 8288, 9740, 10360, 13636, 15584, 17045, 18019, 19480, 20720, 27272, 34090, 36038, 38960, 41440, 54544, 68180, 72076, 77920, 90095, 109088, 126133, 136360, 144152, 180190, 252266, 272720, 288304, 360380, 504532, 545440, 576608, 630665, 720760, 1009064, 1261330, 1441520, 2018128, 2522660, 2883040, 4036256, 5045320, 10090640, 20181280]

約数ペア:

[(1, 20181280), (2, 10090640), (4, 5045320), (5, 4036256), (7, 2883040), (8, 2522660), (10, 2018128), (14, 1441520), (16, 1261330), (20, 1009064), (28, 720760), (32, 630665), (35, 576608), (37, 545440), (40, 504532), (56, 360380), (70, 288304), (74, 272720), (80, 252266), (112, 180190), (140, 144152), (148, 136360), (160, 126133), (185, 109088), (224, 90095), (259, 77920), (280, 72076), (296, 68180), (370, 54544), (487, 41440), (518, 38960), (560, 36038), (592, 34090), (740, 27272), (974, 20720), (1036, 19480), (1120, 18019), (1184, 17045), (1295, 15584), (1480, 13636), (1948, 10360), (2072, 9740), (2435, 8288), (2590, 7792), (2960, 6818), (3409, 5920), (3896, 5180), (4144, 4870)]