21365280

素因数分解:

$2^5\times 3^2\times 5^1\times {\mathrm{37}}^1\times {\mathrm{401}}^1$

素因数の和:459

約数の個数: 144

約数和(自身を含む): 75066264

約数和(自身を除く): 53700984

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 30, 32, 36, 37, 40, 45, 48, 60, 72, 74, 80, 90, 96, 111, 120, 144, 148, 160, 180, 185, 222, 240, 288, 296, 333, 360, 370, 401, 444, 480, 555, 592, 666, 720, 740, 802, 888, 1110, 1184, 1203, 1332, 1440, 1480, 1604, 1665, 1776, 2005, 2220, 2406, 2664, 2960, 3208, 3330, 3552, 3609, 4010, 4440, 4812, 5328, 5920, 6015, 6416, 6660, 7218, 8020, 8880, 9624, 10656, 12030, 12832, 13320, 14436, 14837, 16040, 17760, 18045, 19248, 24060, 26640, 28872, 29674, 32080, 36090, 38496, 44511, 48120, 53280, 57744, 59348, 64160, 72180, 74185, 89022, 96240, 115488, 118696, 133533, 144360, 148370, 178044, 192480, 222555, 237392, 267066, 288720, 296740, 356088, 445110, 474784, 534132, 577440, 593480, 667665, 712176, 890220, 1068264, 1186960, 1335330, 1424352, 1780440, 2136528, 2373920, 2670660, 3560880, 4273056, 5341320, 7121760, 10682640, 21365280]

約数ペア:

[(1, 21365280), (2, 10682640), (3, 7121760), (4, 5341320), (5, 4273056), (6, 3560880), (8, 2670660), (9, 2373920), (10, 2136528), (12, 1780440), (15, 1424352), (16, 1335330), (18, 1186960), (20, 1068264), (24, 890220), (30, 712176), (32, 667665), (36, 593480), (37, 577440), (40, 534132), (45, 474784), (48, 445110), (60, 356088), (72, 296740), (74, 288720), (80, 267066), (90, 237392), (96, 222555), (111, 192480), (120, 178044), (144, 148370), (148, 144360), (160, 133533), (180, 118696), (185, 115488), (222, 96240), (240, 89022), (288, 74185), (296, 72180), (333, 64160), (360, 59348), (370, 57744), (401, 53280), (444, 48120), (480, 44511), (555, 38496), (592, 36090), (666, 32080), (720, 29674), (740, 28872), (802, 26640), (888, 24060), (1110, 19248), (1184, 18045), (1203, 17760), (1332, 16040), (1440, 14837), (1480, 14436), (1604, 13320), (1665, 12832), (1776, 12030), (2005, 10656), (2220, 9624), (2406, 8880), (2664, 8020), (2960, 7218), (3208, 6660), (3330, 6416), (3552, 6015), (3609, 5920), (4010, 5328), (4440, 4812)]