20803440

素因数分解:

$2^4\times 3^1\times 5^1\times 7^2\times {\mathrm{29}}^1\times {\mathrm{61}}^1$

素因数の和:120

約数の個数: 240

約数和(自身を含む): 78878880

約数和(自身を除く): 58075440

約数列:

[1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 14, 15, 16, 20, 21, 24, 28, 29, 30, 35, 40, 42, 48, 49, 56, 58, 60, 61, 70, 80, 84, 87, 98, 105, 112, 116, 120, 122, 140, 145, 147, 168, 174, 183, 196, 203, 210, 232, 240, 244, 245, 280, 290, 294, 305, 336, 348, 366, 392, 406, 420, 427, 435, 464, 488, 490, 560, 580, 588, 609, 610, 696, 732, 735, 784, 812, 840, 854, 870, 915, 976, 980, 1015, 1160, 1176, 1218, 1220, 1281, 1392, 1421, 1464, 1470, 1624, 1680, 1708, 1740, 1769, 1830, 1960, 2030, 2135, 2320, 2352, 2436, 2440, 2562, 2842, 2928, 2940, 2989, 3045, 3248, 3416, 3480, 3538, 3660, 3920, 4060, 4263, 4270, 4872, 4880, 5124, 5307, 5684, 5880, 5978, 6090, 6405, 6832, 6960, 7076, 7105, 7320, 8120, 8526, 8540, 8845, 8967, 9744, 10248, 10614, 11368, 11760, 11956, 12180, 12383, 12810, 14152, 14210, 14640, 14945, 16240, 17052, 17080, 17690, 17934, 20496, 21228, 21315, 22736, 23912, 24360, 24766, 25620, 26535, 28304, 28420, 29890, 34104, 34160, 35380, 35868, 37149, 42456, 42630, 44835, 47824, 48720, 49532, 51240, 53070, 56840, 59780, 61915, 68208, 70760, 71736, 74298, 84912, 85260, 86681, 89670, 99064, 102480, 106140, 113680, 119560, 123830, 141520, 143472, 148596, 170520, 173362, 179340, 185745, 198128, 212280, 239120, 247660, 260043, 297192, 341040, 346724, 358680, 371490, 424560, 433405, 495320, 520086, 594384, 693448, 717360, 742980, 866810, 990640, 1040172, 1300215, 1386896, 1485960, 1733620, 2080344, 2600430, 2971920, 3467240, 4160688, 5200860, 6934480, 10401720, 20803440]

約数ペア:

[(1, 20803440), (2, 10401720), (3, 6934480), (4, 5200860), (5, 4160688), (6, 3467240), (7, 2971920), (8, 2600430), (10, 2080344), (12, 1733620), (14, 1485960), (15, 1386896), (16, 1300215), (20, 1040172), (21, 990640), (24, 866810), (28, 742980), (29, 717360), (30, 693448), (35, 594384), (40, 520086), (42, 495320), (48, 433405), (49, 424560), (56, 371490), (58, 358680), (60, 346724), (61, 341040), (70, 297192), (80, 260043), (84, 247660), (87, 239120), (98, 212280), (105, 198128), (112, 185745), (116, 179340), (120, 173362), (122, 170520), (140, 148596), (145, 143472), (147, 141520), (168, 123830), (174, 119560), (183, 113680), (196, 106140), (203, 102480), (210, 99064), (232, 89670), (240, 86681), (244, 85260), (245, 84912), (280, 74298), (290, 71736), (294, 70760), (305, 68208), (336, 61915), (348, 59780), (366, 56840), (392, 53070), (406, 51240), (420, 49532), (427, 48720), (435, 47824), (464, 44835), (488, 42630), (490, 42456), (560, 37149), (580, 35868), (588, 35380), (609, 34160), (610, 34104), (696, 29890), (732, 28420), (735, 28304), (784, 26535), (812, 25620), (840, 24766), (854, 24360), (870, 23912), (915, 22736), (976, 21315), (980, 21228), (1015, 20496), (1160, 17934), (1176, 17690), (1218, 17080), (1220, 17052), (1281, 16240), (1392, 14945), (1421, 14640), (1464, 14210), (1470, 14152), (1624, 12810), (1680, 12383), (1708, 12180), (1740, 11956), (1769, 11760), (1830, 11368), (1960, 10614), (2030, 10248), (2135, 9744), (2320, 8967), (2352, 8845), (2436, 8540), (2440, 8526), (2562, 8120), (2842, 7320), (2928, 7105), (2940, 7076), (2989, 6960), (3045, 6832), (3248, 6405), (3416, 6090), (3480, 5978), (3538, 5880), (3660, 5684), (3920, 5307), (4060, 5124), (4263, 4880), (4270, 4872)]