20988720

素因数分解:

$2^4\times 3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{79}}^1$

素因数の和:145

約数の個数: 200

約数和(自身を含む): 75620160

約数和(自身を除く): 54631440

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 12, 15, 16, 18, 20, 24, 27, 30, 36, 40, 41, 45, 48, 54, 60, 72, 79, 80, 81, 82, 90, 108, 120, 123, 135, 144, 158, 162, 164, 180, 205, 216, 237, 240, 246, 270, 316, 324, 328, 360, 369, 395, 405, 410, 432, 474, 492, 540, 615, 632, 648, 656, 711, 720, 738, 790, 810, 820, 948, 984, 1080, 1107, 1185, 1230, 1264, 1296, 1422, 1476, 1580, 1620, 1640, 1845, 1896, 1968, 2133, 2160, 2214, 2370, 2460, 2844, 2952, 3160, 3239, 3240, 3280, 3321, 3555, 3690, 3792, 4266, 4428, 4740, 4920, 5535, 5688, 5904, 6320, 6399, 6478, 6480, 6642, 7110, 7380, 8532, 8856, 9480, 9717, 9840, 10665, 11070, 11376, 12798, 12956, 13284, 14220, 14760, 16195, 16605, 17064, 17712, 18960, 19434, 21330, 22140, 25596, 25912, 26568, 28440, 29151, 29520, 31995, 32390, 33210, 34128, 38868, 42660, 44280, 48585, 51192, 51824, 53136, 56880, 58302, 63990, 64780, 66420, 77736, 85320, 87453, 88560, 97170, 102384, 116604, 127980, 129560, 132840, 145755, 155472, 170640, 174906, 194340, 233208, 255960, 259120, 262359, 265680, 291510, 349812, 388680, 437265, 466416, 511920, 524718, 583020, 699624, 777360, 874530, 1049436, 1166040, 1311795, 1399248, 1749060, 2098872, 2332080, 2623590, 3498120, 4197744, 5247180, 6996240, 10494360, 20988720]

約数ペア:

[(1, 20988720), (2, 10494360), (3, 6996240), (4, 5247180), (5, 4197744), (6, 3498120), (8, 2623590), (9, 2332080), (10, 2098872), (12, 1749060), (15, 1399248), (16, 1311795), (18, 1166040), (20, 1049436), (24, 874530), (27, 777360), (30, 699624), (36, 583020), (40, 524718), (41, 511920), (45, 466416), (48, 437265), (54, 388680), (60, 349812), (72, 291510), (79, 265680), (80, 262359), (81, 259120), (82, 255960), (90, 233208), (108, 194340), (120, 174906), (123, 170640), (135, 155472), (144, 145755), (158, 132840), (162, 129560), (164, 127980), (180, 116604), (205, 102384), (216, 97170), (237, 88560), (240, 87453), (246, 85320), (270, 77736), (316, 66420), (324, 64780), (328, 63990), (360, 58302), (369, 56880), (395, 53136), (405, 51824), (410, 51192), (432, 48585), (474, 44280), (492, 42660), (540, 38868), (615, 34128), (632, 33210), (648, 32390), (656, 31995), (711, 29520), (720, 29151), (738, 28440), (790, 26568), (810, 25912), (820, 25596), (948, 22140), (984, 21330), (1080, 19434), (1107, 18960), (1185, 17712), (1230, 17064), (1264, 16605), (1296, 16195), (1422, 14760), (1476, 14220), (1580, 13284), (1620, 12956), (1640, 12798), (1845, 11376), (1896, 11070), (1968, 10665), (2133, 9840), (2160, 9717), (2214, 9480), (2370, 8856), (2460, 8532), (2844, 7380), (2952, 7110), (3160, 6642), (3239, 6480), (3240, 6478), (3280, 6399), (3321, 6320), (3555, 5904), (3690, 5688), (3792, 5535), (4266, 4920), (4428, 4740)]