21031380

素因数分解:

$2^2\times 3^3\times 5^1\times {\mathrm{17}}^1\times {\mathrm{29}}^1\times {\mathrm{79}}^1$

素因数の和:143

約数の個数: 192

約数和(自身を含む): 72576000

約数和(自身を除く): 51544620

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 12, 15, 17, 18, 20, 27, 29, 30, 34, 36, 45, 51, 54, 58, 60, 68, 79, 85, 87, 90, 102, 108, 116, 135, 145, 153, 158, 170, 174, 180, 204, 237, 255, 261, 270, 290, 306, 316, 340, 348, 395, 435, 459, 474, 493, 510, 522, 540, 580, 612, 711, 765, 783, 790, 870, 918, 948, 986, 1020, 1044, 1185, 1305, 1343, 1422, 1479, 1530, 1566, 1580, 1740, 1836, 1972, 2133, 2291, 2295, 2370, 2465, 2610, 2686, 2844, 2958, 3060, 3132, 3555, 3915, 4029, 4266, 4437, 4582, 4590, 4740, 4930, 5220, 5372, 5916, 6715, 6873, 7110, 7395, 7830, 8058, 8532, 8874, 9164, 9180, 9860, 10665, 11455, 12087, 13311, 13430, 13746, 14220, 14790, 15660, 16116, 17748, 20145, 20619, 21330, 22185, 22910, 24174, 26622, 26860, 27492, 29580, 34365, 36261, 38947, 40290, 41238, 42660, 44370, 45820, 48348, 53244, 60435, 61857, 66555, 68730, 72522, 77894, 80580, 82476, 88740, 103095, 116841, 120870, 123714, 133110, 137460, 145044, 155788, 181305, 194735, 206190, 233682, 241740, 247428, 266220, 309285, 350523, 362610, 389470, 412380, 467364, 584205, 618570, 701046, 725220, 778940, 1051569, 1168410, 1237140, 1402092, 1752615, 2103138, 2336820, 3505230, 4206276, 5257845, 7010460, 10515690, 21031380]

約数ペア:

[(1, 21031380), (2, 10515690), (3, 7010460), (4, 5257845), (5, 4206276), (6, 3505230), (9, 2336820), (10, 2103138), (12, 1752615), (15, 1402092), (17, 1237140), (18, 1168410), (20, 1051569), (27, 778940), (29, 725220), (30, 701046), (34, 618570), (36, 584205), (45, 467364), (51, 412380), (54, 389470), (58, 362610), (60, 350523), (68, 309285), (79, 266220), (85, 247428), (87, 241740), (90, 233682), (102, 206190), (108, 194735), (116, 181305), (135, 155788), (145, 145044), (153, 137460), (158, 133110), (170, 123714), (174, 120870), (180, 116841), (204, 103095), (237, 88740), (255, 82476), (261, 80580), (270, 77894), (290, 72522), (306, 68730), (316, 66555), (340, 61857), (348, 60435), (395, 53244), (435, 48348), (459, 45820), (474, 44370), (493, 42660), (510, 41238), (522, 40290), (540, 38947), (580, 36261), (612, 34365), (711, 29580), (765, 27492), (783, 26860), (790, 26622), (870, 24174), (918, 22910), (948, 22185), (986, 21330), (1020, 20619), (1044, 20145), (1185, 17748), (1305, 16116), (1343, 15660), (1422, 14790), (1479, 14220), (1530, 13746), (1566, 13430), (1580, 13311), (1740, 12087), (1836, 11455), (1972, 10665), (2133, 9860), (2291, 9180), (2295, 9164), (2370, 8874), (2465, 8532), (2610, 8058), (2686, 7830), (2844, 7395), (2958, 7110), (3060, 6873), (3132, 6715), (3555, 5916), (3915, 5372), (4029, 5220), (4266, 4930), (4437, 4740), (4582, 4590)]