21293280

素因数分解:

$2^5\times 3^4\times 5^1\times {\mathrm{31}}^1\times {\mathrm{53}}^1$

素因数の和:111

約数の個数: 240

約数和(自身を含む): 79035264

約数和(自身を除く): 57741984

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 31, 32, 36, 40, 45, 48, 53, 54, 60, 62, 72, 80, 81, 90, 93, 96, 106, 108, 120, 124, 135, 144, 155, 159, 160, 162, 180, 186, 212, 216, 240, 248, 265, 270, 279, 288, 310, 318, 324, 360, 372, 405, 424, 432, 465, 477, 480, 496, 530, 540, 558, 620, 636, 648, 720, 744, 795, 810, 837, 848, 864, 930, 954, 992, 1060, 1080, 1116, 1240, 1272, 1296, 1395, 1431, 1440, 1488, 1590, 1620, 1643, 1674, 1696, 1860, 1908, 2120, 2160, 2232, 2385, 2480, 2511, 2544, 2592, 2790, 2862, 2976, 3180, 3240, 3286, 3348, 3720, 3816, 4185, 4240, 4293, 4320, 4464, 4770, 4929, 4960, 5022, 5088, 5580, 5724, 6360, 6480, 6572, 6696, 7155, 7440, 7632, 8215, 8370, 8480, 8586, 8928, 9540, 9858, 10044, 11160, 11448, 12555, 12720, 12960, 13144, 13392, 14310, 14787, 14880, 15264, 16430, 16740, 17172, 19080, 19716, 20088, 21465, 22320, 22896, 24645, 25110, 25440, 26288, 26784, 28620, 29574, 32860, 33480, 34344, 38160, 39432, 40176, 42930, 44361, 44640, 45792, 49290, 50220, 52576, 57240, 59148, 65720, 66960, 68688, 73935, 76320, 78864, 80352, 85860, 88722, 98580, 100440, 114480, 118296, 131440, 133083, 133920, 137376, 147870, 157728, 171720, 177444, 197160, 200880, 221805, 228960, 236592, 262880, 266166, 295740, 343440, 354888, 394320, 401760, 443610, 473184, 532332, 591480, 665415, 686880, 709776, 788640, 887220, 1064664, 1182960, 1330830, 1419552, 1774440, 2129328, 2365920, 2661660, 3548880, 4258656, 5323320, 7097760, 10646640, 21293280]

約数ペア:

[(1, 21293280), (2, 10646640), (3, 7097760), (4, 5323320), (5, 4258656), (6, 3548880), (8, 2661660), (9, 2365920), (10, 2129328), (12, 1774440), (15, 1419552), (16, 1330830), (18, 1182960), (20, 1064664), (24, 887220), (27, 788640), (30, 709776), (31, 686880), (32, 665415), (36, 591480), (40, 532332), (45, 473184), (48, 443610), (53, 401760), (54, 394320), (60, 354888), (62, 343440), (72, 295740), (80, 266166), (81, 262880), (90, 236592), (93, 228960), (96, 221805), (106, 200880), (108, 197160), (120, 177444), (124, 171720), (135, 157728), (144, 147870), (155, 137376), (159, 133920), (160, 133083), (162, 131440), (180, 118296), (186, 114480), (212, 100440), (216, 98580), (240, 88722), (248, 85860), (265, 80352), (270, 78864), (279, 76320), (288, 73935), (310, 68688), (318, 66960), (324, 65720), (360, 59148), (372, 57240), (405, 52576), (424, 50220), (432, 49290), (465, 45792), (477, 44640), (480, 44361), (496, 42930), (530, 40176), (540, 39432), (558, 38160), (620, 34344), (636, 33480), (648, 32860), (720, 29574), (744, 28620), (795, 26784), (810, 26288), (837, 25440), (848, 25110), (864, 24645), (930, 22896), (954, 22320), (992, 21465), (1060, 20088), (1080, 19716), (1116, 19080), (1240, 17172), (1272, 16740), (1296, 16430), (1395, 15264), (1431, 14880), (1440, 14787), (1488, 14310), (1590, 13392), (1620, 13144), (1643, 12960), (1674, 12720), (1696, 12555), (1860, 11448), (1908, 11160), (2120, 10044), (2160, 9858), (2232, 9540), (2385, 8928), (2480, 8586), (2511, 8480), (2544, 8370), (2592, 8215), (2790, 7632), (2862, 7440), (2976, 7155), (3180, 6696), (3240, 6572), (3286, 6480), (3348, 6360), (3720, 5724), (3816, 5580), (4185, 5088), (4240, 5022), (4293, 4960), (4320, 4929), (4464, 4770)]