20647440

素因数分解:

$2^4\times 3^3\times 5^1\times {\mathrm{11}}^2\times {\mathrm{79}}^1$

素因数の和:123

約数の個数: 240

約数和(自身を含む): 79161600

約数和(自身を除く): 58514160

約数列:

[1, 2, 3, 4, 5, 6, 8, 9, 10, 11, 12, 15, 16, 18, 20, 22, 24, 27, 30, 33, 36, 40, 44, 45, 48, 54, 55, 60, 66, 72, 79, 80, 88, 90, 99, 108, 110, 120, 121, 132, 135, 144, 158, 165, 176, 180, 198, 216, 220, 237, 240, 242, 264, 270, 297, 316, 330, 360, 363, 395, 396, 432, 440, 474, 484, 495, 528, 540, 594, 605, 632, 660, 711, 720, 726, 790, 792, 869, 880, 948, 968, 990, 1080, 1089, 1185, 1188, 1210, 1264, 1320, 1422, 1452, 1485, 1580, 1584, 1738, 1815, 1896, 1936, 1980, 2133, 2160, 2178, 2370, 2376, 2420, 2607, 2640, 2844, 2904, 2970, 3160, 3267, 3476, 3555, 3630, 3792, 3960, 4266, 4345, 4356, 4740, 4752, 4840, 5214, 5445, 5688, 5808, 5940, 6320, 6534, 6952, 7110, 7260, 7821, 7920, 8532, 8690, 8712, 9480, 9559, 9680, 10428, 10665, 10890, 11376, 11880, 13035, 13068, 13904, 14220, 14520, 15642, 16335, 17064, 17380, 17424, 18960, 19118, 20856, 21330, 21780, 23463, 23760, 26070, 26136, 28440, 28677, 29040, 31284, 32670, 34128, 34760, 38236, 39105, 41712, 42660, 43560, 46926, 47795, 52140, 52272, 56880, 57354, 62568, 65340, 69520, 76472, 78210, 85320, 86031, 87120, 93852, 95590, 104280, 114708, 117315, 125136, 130680, 143385, 152944, 156420, 170640, 172062, 187704, 191180, 208560, 229416, 234630, 258093, 261360, 286770, 312840, 344124, 375408, 382360, 430155, 458832, 469260, 516186, 573540, 625680, 688248, 764720, 860310, 938520, 1032372, 1147080, 1290465, 1376496, 1720620, 1877040, 2064744, 2294160, 2580930, 3441240, 4129488, 5161860, 6882480, 10323720, 20647440]

約数ペア:

[(1, 20647440), (2, 10323720), (3, 6882480), (4, 5161860), (5, 4129488), (6, 3441240), (8, 2580930), (9, 2294160), (10, 2064744), (11, 1877040), (12, 1720620), (15, 1376496), (16, 1290465), (18, 1147080), (20, 1032372), (22, 938520), (24, 860310), (27, 764720), (30, 688248), (33, 625680), (36, 573540), (40, 516186), (44, 469260), (45, 458832), (48, 430155), (54, 382360), (55, 375408), (60, 344124), (66, 312840), (72, 286770), (79, 261360), (80, 258093), (88, 234630), (90, 229416), (99, 208560), (108, 191180), (110, 187704), (120, 172062), (121, 170640), (132, 156420), (135, 152944), (144, 143385), (158, 130680), (165, 125136), (176, 117315), (180, 114708), (198, 104280), (216, 95590), (220, 93852), (237, 87120), (240, 86031), (242, 85320), (264, 78210), (270, 76472), (297, 69520), (316, 65340), (330, 62568), (360, 57354), (363, 56880), (395, 52272), (396, 52140), (432, 47795), (440, 46926), (474, 43560), (484, 42660), (495, 41712), (528, 39105), (540, 38236), (594, 34760), (605, 34128), (632, 32670), (660, 31284), (711, 29040), (720, 28677), (726, 28440), (790, 26136), (792, 26070), (869, 23760), (880, 23463), (948, 21780), (968, 21330), (990, 20856), (1080, 19118), (1089, 18960), (1185, 17424), (1188, 17380), (1210, 17064), (1264, 16335), (1320, 15642), (1422, 14520), (1452, 14220), (1485, 13904), (1580, 13068), (1584, 13035), (1738, 11880), (1815, 11376), (1896, 10890), (1936, 10665), (1980, 10428), (2133, 9680), (2160, 9559), (2178, 9480), (2370, 8712), (2376, 8690), (2420, 8532), (2607, 7920), (2640, 7821), (2844, 7260), (2904, 7110), (2970, 6952), (3160, 6534), (3267, 6320), (3476, 5940), (3555, 5808), (3630, 5688), (3792, 5445), (3960, 5214), (4266, 4840), (4345, 4752), (4356, 4740)]