1991115120

素因数分解:

$2^4\times 3^1\times 5^1\times {\mathrm{31}}^2\times {\mathrm{89}}^1\times {\mathrm{97}}^1$

素因数の和:264

約数の個数: 240

約数和(自身を含む): 6516145440

約数和(自身を除く): 4525030320

約数列:

[1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 16, 20, 24, 30, 31, 40, 48, 60, 62, 80, 89, 93, 97, 120, 124, 155, 178, 186, 194, 240, 248, 267, 291, 310, 356, 372, 388, 445, 465, 485, 496, 534, 582, 620, 712, 744, 776, 890, 930, 961, 970, 1068, 1164, 1240, 1335, 1424, 1455, 1488, 1552, 1780, 1860, 1922, 1940, 2136, 2328, 2480, 2670, 2759, 2883, 2910, 3007, 3560, 3720, 3844, 3880, 4272, 4656, 4805, 5340, 5518, 5766, 5820, 6014, 7120, 7440, 7688, 7760, 8277, 8633, 9021, 9610, 10680, 11036, 11532, 11640, 12028, 13795, 14415, 15035, 15376, 16554, 17266, 18042, 19220, 21360, 22072, 23064, 23280, 24056, 25899, 27590, 28830, 30070, 33108, 34532, 36084, 38440, 41385, 43165, 44144, 45105, 46128, 48112, 51798, 55180, 57660, 60140, 66216, 69064, 72168, 76880, 82770, 85529, 86330, 90210, 93217, 103596, 110360, 115320, 120280, 129495, 132432, 138128, 144336, 165540, 171058, 172660, 180420, 186434, 207192, 220720, 230640, 240560, 256587, 258990, 267623, 279651, 331080, 342116, 345320, 360840, 372868, 414384, 427645, 466085, 513174, 517980, 535246, 559302, 662160, 684232, 690640, 721680, 745736, 802869, 855290, 932170, 1026348, 1035960, 1070492, 1118604, 1282935, 1338115, 1368464, 1398255, 1491472, 1605738, 1710580, 1864340, 2052696, 2071920, 2140984, 2237208, 2565870, 2676230, 2796510, 3211476, 3421160, 3728680, 4014345, 4105392, 4281968, 4474416, 5131740, 5352460, 5593020, 6422952, 6842320, 7457360, 8028690, 8296313, 10263480, 10704920, 11186040, 12845904, 16057380, 16592626, 20526960, 21409840, 22372080, 24888939, 32114760, 33185252, 41481565, 49777878, 64229520, 66370504, 82963130, 99555756, 124444695, 132741008, 165926260, 199111512, 248889390, 331852520, 398223024, 497778780, 663705040, 995557560, 1991115120]

約数ペア:

[(1, 1991115120), (2, 995557560), (3, 663705040), (4, 497778780), (5, 398223024), (6, 331852520), (8, 248889390), (10, 199111512), (12, 165926260), (15, 132741008), (16, 124444695), (20, 99555756), (24, 82963130), (30, 66370504), (31, 64229520), (40, 49777878), (48, 41481565), (60, 33185252), (62, 32114760), (80, 24888939), (89, 22372080), (93, 21409840), (97, 20526960), (120, 16592626), (124, 16057380), (155, 12845904), (178, 11186040), (186, 10704920), (194, 10263480), (240, 8296313), (248, 8028690), (267, 7457360), (291, 6842320), (310, 6422952), (356, 5593020), (372, 5352460), (388, 5131740), (445, 4474416), (465, 4281968), (485, 4105392), (496, 4014345), (534, 3728680), (582, 3421160), (620, 3211476), (712, 2796510), (744, 2676230), (776, 2565870), (890, 2237208), (930, 2140984), (961, 2071920), (970, 2052696), (1068, 1864340), (1164, 1710580), (1240, 1605738), (1335, 1491472), (1424, 1398255), (1455, 1368464), (1488, 1338115), (1552, 1282935), (1780, 1118604), (1860, 1070492), (1922, 1035960), (1940, 1026348), (2136, 932170), (2328, 855290), (2480, 802869), (2670, 745736), (2759, 721680), (2883, 690640), (2910, 684232), (3007, 662160), (3560, 559302), (3720, 535246), (3844, 517980), (3880, 513174), (4272, 466085), (4656, 427645), (4805, 414384), (5340, 372868), (5518, 360840), (5766, 345320), (5820, 342116), (6014, 331080), (7120, 279651), (7440, 267623), (7688, 258990), (7760, 256587), (8277, 240560), (8633, 230640), (9021, 220720), (9610, 207192), (10680, 186434), (11036, 180420), (11532, 172660), (11640, 171058), (12028, 165540), (13795, 144336), (14415, 138128), (15035, 132432), (15376, 129495), (16554, 120280), (17266, 115320), (18042, 110360), (19220, 103596), (21360, 93217), (22072, 90210), (23064, 86330), (23280, 85529), (24056, 82770), (25899, 76880), (27590, 72168), (28830, 69064), (30070, 66216), (33108, 60140), (34532, 57660), (36084, 55180), (38440, 51798), (41385, 48112), (43165, 46128), (44144, 45105)]