21279720

素因数分解:

$2^3\times 3^1\times 5^1\times 7^3\times {\mathrm{11}}^1\times {\mathrm{47}}^1$

素因数の和:93

約数の個数: 256

約数和(自身を含む): 82944000

約数和(自身を除く): 61664280

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 11, 12, 14, 15, 20, 21, 22, 24, 28, 30, 33, 35, 40, 42, 44, 47, 49, 55, 56, 60, 66, 70, 77, 84, 88, 94, 98, 105, 110, 120, 132, 140, 141, 147, 154, 165, 168, 188, 196, 210, 220, 231, 235, 245, 264, 280, 282, 294, 308, 329, 330, 343, 376, 385, 392, 420, 440, 462, 470, 490, 517, 539, 564, 588, 616, 658, 660, 686, 705, 735, 770, 840, 924, 940, 980, 987, 1029, 1034, 1078, 1128, 1155, 1176, 1316, 1320, 1372, 1410, 1470, 1540, 1551, 1617, 1645, 1715, 1848, 1880, 1960, 1974, 2058, 2068, 2156, 2303, 2310, 2585, 2632, 2695, 2744, 2820, 2940, 3080, 3102, 3234, 3290, 3430, 3619, 3773, 3948, 4116, 4136, 4312, 4606, 4620, 4935, 5145, 5170, 5390, 5640, 5880, 6204, 6468, 6580, 6860, 6909, 7238, 7546, 7755, 7896, 8085, 8232, 9212, 9240, 9870, 10290, 10340, 10780, 10857, 11319, 11515, 12408, 12936, 13160, 13720, 13818, 14476, 15092, 15510, 16121, 16170, 18095, 18424, 18865, 19740, 20580, 20680, 21560, 21714, 22638, 23030, 25333, 27636, 28952, 30184, 31020, 32242, 32340, 34545, 36190, 37730, 39480, 41160, 43428, 45276, 46060, 48363, 50666, 54285, 55272, 56595, 62040, 64484, 64680, 69090, 72380, 75460, 75999, 80605, 86856, 90552, 92120, 96726, 101332, 108570, 113190, 126665, 128968, 138180, 144760, 150920, 151998, 161210, 177331, 193452, 202664, 217140, 226380, 241815, 253330, 276360, 303996, 322420, 354662, 379995, 386904, 434280, 452760, 483630, 506660, 531993, 607992, 644840, 709324, 759990, 886655, 967260, 1013320, 1063986, 1418648, 1519980, 1773310, 1934520, 2127972, 2659965, 3039960, 3546620, 4255944, 5319930, 7093240, 10639860, 21279720]

約数ペア:

[(1, 21279720), (2, 10639860), (3, 7093240), (4, 5319930), (5, 4255944), (6, 3546620), (7, 3039960), (8, 2659965), (10, 2127972), (11, 1934520), (12, 1773310), (14, 1519980), (15, 1418648), (20, 1063986), (21, 1013320), (22, 967260), (24, 886655), (28, 759990), (30, 709324), (33, 644840), (35, 607992), (40, 531993), (42, 506660), (44, 483630), (47, 452760), (49, 434280), (55, 386904), (56, 379995), (60, 354662), (66, 322420), (70, 303996), (77, 276360), (84, 253330), (88, 241815), (94, 226380), (98, 217140), (105, 202664), (110, 193452), (120, 177331), (132, 161210), (140, 151998), (141, 150920), (147, 144760), (154, 138180), (165, 128968), (168, 126665), (188, 113190), (196, 108570), (210, 101332), (220, 96726), (231, 92120), (235, 90552), (245, 86856), (264, 80605), (280, 75999), (282, 75460), (294, 72380), (308, 69090), (329, 64680), (330, 64484), (343, 62040), (376, 56595), (385, 55272), (392, 54285), (420, 50666), (440, 48363), (462, 46060), (470, 45276), (490, 43428), (517, 41160), (539, 39480), (564, 37730), (588, 36190), (616, 34545), (658, 32340), (660, 32242), (686, 31020), (705, 30184), (735, 28952), (770, 27636), (840, 25333), (924, 23030), (940, 22638), (980, 21714), (987, 21560), (1029, 20680), (1034, 20580), (1078, 19740), (1128, 18865), (1155, 18424), (1176, 18095), (1316, 16170), (1320, 16121), (1372, 15510), (1410, 15092), (1470, 14476), (1540, 13818), (1551, 13720), (1617, 13160), (1645, 12936), (1715, 12408), (1848, 11515), (1880, 11319), (1960, 10857), (1974, 10780), (2058, 10340), (2068, 10290), (2156, 9870), (2303, 9240), (2310, 9212), (2585, 8232), (2632, 8085), (2695, 7896), (2744, 7755), (2820, 7546), (2940, 7238), (3080, 6909), (3102, 6860), (3234, 6580), (3290, 6468), (3430, 6204), (3619, 5880), (3773, 5640), (3948, 5390), (4116, 5170), (4136, 5145), (4312, 4935), (4606, 4620)]