20797560

素因数分解:

$2^3\times 3^4\times 5^1\times 7^2\times {\mathrm{131}}^1$

素因数の和:168

約数の個数: 240

約数和(自身を含む): 81936360

約数和(自身を除く): 61138800

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 14, 15, 18, 20, 21, 24, 27, 28, 30, 35, 36, 40, 42, 45, 49, 54, 56, 60, 63, 70, 72, 81, 84, 90, 98, 105, 108, 120, 126, 131, 135, 140, 147, 162, 168, 180, 189, 196, 210, 216, 245, 252, 262, 270, 280, 294, 315, 324, 360, 378, 392, 393, 405, 420, 441, 490, 504, 524, 540, 567, 588, 630, 648, 655, 735, 756, 786, 810, 840, 882, 917, 945, 980, 1048, 1080, 1134, 1176, 1179, 1260, 1310, 1323, 1470, 1512, 1572, 1620, 1764, 1834, 1890, 1960, 1965, 2205, 2268, 2358, 2520, 2620, 2646, 2751, 2835, 2940, 3144, 3240, 3528, 3537, 3668, 3780, 3930, 3969, 4410, 4536, 4585, 4716, 5240, 5292, 5502, 5670, 5880, 5895, 6419, 6615, 7074, 7336, 7560, 7860, 7938, 8253, 8820, 9170, 9432, 10584, 10611, 11004, 11340, 11790, 12838, 13230, 13755, 14148, 15720, 15876, 16506, 17640, 17685, 18340, 19257, 19845, 21222, 22008, 22680, 23580, 24759, 25676, 26460, 27510, 28296, 31752, 32095, 33012, 35370, 36680, 38514, 39690, 41265, 42444, 47160, 49518, 51352, 52920, 53055, 55020, 57771, 64190, 66024, 70740, 74277, 77028, 79380, 82530, 84888, 96285, 99036, 106110, 110040, 115542, 123795, 128380, 141480, 148554, 154056, 158760, 165060, 173313, 192570, 198072, 212220, 231084, 247590, 256760, 288855, 297108, 330120, 346626, 371385, 385140, 424440, 462168, 495180, 519939, 577710, 594216, 693252, 742770, 770280, 866565, 990360, 1039878, 1155420, 1386504, 1485540, 1733130, 2079756, 2310840, 2599695, 2971080, 3466260, 4159512, 5199390, 6932520, 10398780, 20797560]

約数ペア:

[(1, 20797560), (2, 10398780), (3, 6932520), (4, 5199390), (5, 4159512), (6, 3466260), (7, 2971080), (8, 2599695), (9, 2310840), (10, 2079756), (12, 1733130), (14, 1485540), (15, 1386504), (18, 1155420), (20, 1039878), (21, 990360), (24, 866565), (27, 770280), (28, 742770), (30, 693252), (35, 594216), (36, 577710), (40, 519939), (42, 495180), (45, 462168), (49, 424440), (54, 385140), (56, 371385), (60, 346626), (63, 330120), (70, 297108), (72, 288855), (81, 256760), (84, 247590), (90, 231084), (98, 212220), (105, 198072), (108, 192570), (120, 173313), (126, 165060), (131, 158760), (135, 154056), (140, 148554), (147, 141480), (162, 128380), (168, 123795), (180, 115542), (189, 110040), (196, 106110), (210, 99036), (216, 96285), (245, 84888), (252, 82530), (262, 79380), (270, 77028), (280, 74277), (294, 70740), (315, 66024), (324, 64190), (360, 57771), (378, 55020), (392, 53055), (393, 52920), (405, 51352), (420, 49518), (441, 47160), (490, 42444), (504, 41265), (524, 39690), (540, 38514), (567, 36680), (588, 35370), (630, 33012), (648, 32095), (655, 31752), (735, 28296), (756, 27510), (786, 26460), (810, 25676), (840, 24759), (882, 23580), (917, 22680), (945, 22008), (980, 21222), (1048, 19845), (1080, 19257), (1134, 18340), (1176, 17685), (1179, 17640), (1260, 16506), (1310, 15876), (1323, 15720), (1470, 14148), (1512, 13755), (1572, 13230), (1620, 12838), (1764, 11790), (1834, 11340), (1890, 11004), (1960, 10611), (1965, 10584), (2205, 9432), (2268, 9170), (2358, 8820), (2520, 8253), (2620, 7938), (2646, 7860), (2751, 7560), (2835, 7336), (2940, 7074), (3144, 6615), (3240, 6419), (3528, 5895), (3537, 5880), (3668, 5670), (3780, 5502), (3930, 5292), (3969, 5240), (4410, 4716), (4536, 4585)]