21187980

素因数分解:

$2^2\times 3^4\times 5^1\times {\mathrm{11}}^1\times {\mathrm{29}}^1\times {\mathrm{41}}^1$

素因数の和:102

約数の個数: 240

約数和(自身を含む): 76839840

約数和(自身を除く): 55651860

約数列:

[1, 2, 3, 4, 5, 6, 9, 10, 11, 12, 15, 18, 20, 22, 27, 29, 30, 33, 36, 41, 44, 45, 54, 55, 58, 60, 66, 81, 82, 87, 90, 99, 108, 110, 116, 123, 132, 135, 145, 162, 164, 165, 174, 180, 198, 205, 220, 246, 261, 270, 290, 297, 319, 324, 330, 348, 369, 396, 405, 410, 435, 451, 492, 495, 522, 540, 580, 594, 615, 638, 660, 738, 783, 810, 820, 870, 891, 902, 957, 990, 1044, 1107, 1188, 1189, 1230, 1276, 1305, 1353, 1476, 1485, 1566, 1595, 1620, 1740, 1782, 1804, 1845, 1914, 1980, 2214, 2255, 2349, 2378, 2460, 2610, 2706, 2871, 2970, 3132, 3190, 3321, 3564, 3567, 3690, 3828, 3915, 4059, 4428, 4455, 4510, 4698, 4756, 4785, 5220, 5412, 5535, 5742, 5940, 5945, 6380, 6642, 6765, 7134, 7380, 7830, 8118, 8613, 8910, 9020, 9396, 9570, 10701, 11070, 11484, 11745, 11890, 12177, 13079, 13284, 13530, 14268, 14355, 15660, 16236, 16605, 17226, 17820, 17835, 19140, 20295, 21402, 22140, 23490, 23780, 24354, 25839, 26158, 27060, 28710, 32103, 33210, 34452, 35670, 36531, 39237, 40590, 42804, 43065, 46980, 48708, 51678, 52316, 53505, 57420, 60885, 64206, 65395, 66420, 71340, 73062, 78474, 81180, 86130, 96309, 103356, 107010, 117711, 121770, 128412, 129195, 130790, 146124, 156948, 160515, 172260, 182655, 192618, 196185, 214020, 235422, 243540, 258390, 261580, 321030, 353133, 365310, 385236, 392370, 470844, 481545, 516780, 588555, 642060, 706266, 730620, 784740, 963090, 1059399, 1177110, 1412532, 1765665, 1926180, 2118798, 2354220, 3531330, 4237596, 5296995, 7062660, 10593990, 21187980]

約数ペア:

[(1, 21187980), (2, 10593990), (3, 7062660), (4, 5296995), (5, 4237596), (6, 3531330), (9, 2354220), (10, 2118798), (11, 1926180), (12, 1765665), (15, 1412532), (18, 1177110), (20, 1059399), (22, 963090), (27, 784740), (29, 730620), (30, 706266), (33, 642060), (36, 588555), (41, 516780), (44, 481545), (45, 470844), (54, 392370), (55, 385236), (58, 365310), (60, 353133), (66, 321030), (81, 261580), (82, 258390), (87, 243540), (90, 235422), (99, 214020), (108, 196185), (110, 192618), (116, 182655), (123, 172260), (132, 160515), (135, 156948), (145, 146124), (162, 130790), (164, 129195), (165, 128412), (174, 121770), (180, 117711), (198, 107010), (205, 103356), (220, 96309), (246, 86130), (261, 81180), (270, 78474), (290, 73062), (297, 71340), (319, 66420), (324, 65395), (330, 64206), (348, 60885), (369, 57420), (396, 53505), (405, 52316), (410, 51678), (435, 48708), (451, 46980), (492, 43065), (495, 42804), (522, 40590), (540, 39237), (580, 36531), (594, 35670), (615, 34452), (638, 33210), (660, 32103), (738, 28710), (783, 27060), (810, 26158), (820, 25839), (870, 24354), (891, 23780), (902, 23490), (957, 22140), (990, 21402), (1044, 20295), (1107, 19140), (1188, 17835), (1189, 17820), (1230, 17226), (1276, 16605), (1305, 16236), (1353, 15660), (1476, 14355), (1485, 14268), (1566, 13530), (1595, 13284), (1620, 13079), (1740, 12177), (1782, 11890), (1804, 11745), (1845, 11484), (1914, 11070), (1980, 10701), (2214, 9570), (2255, 9396), (2349, 9020), (2378, 8910), (2460, 8613), (2610, 8118), (2706, 7830), (2871, 7380), (2970, 7134), (3132, 6765), (3190, 6642), (3321, 6380), (3564, 5945), (3567, 5940), (3690, 5742), (3828, 5535), (3915, 5412), (4059, 5220), (4428, 4785), (4455, 4756), (4510, 4698)]