20748420

素因数分解:

$2^2\times 3^3\times 5^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{499}}^1$

素因数の和:535

約数の個数: 192

約数和(自身を含む): 80640000

約数和(自身を除く): 59891580

約数列:

[1, 2, 3, 4, 5, 6, 7, 9, 10, 11, 12, 14, 15, 18, 20, 21, 22, 27, 28, 30, 33, 35, 36, 42, 44, 45, 54, 55, 60, 63, 66, 70, 77, 84, 90, 99, 105, 108, 110, 126, 132, 135, 140, 154, 165, 180, 189, 198, 210, 220, 231, 252, 270, 297, 308, 315, 330, 378, 385, 396, 420, 462, 495, 499, 540, 594, 630, 660, 693, 756, 770, 924, 945, 990, 998, 1155, 1188, 1260, 1386, 1485, 1497, 1540, 1890, 1980, 1996, 2079, 2310, 2495, 2772, 2970, 2994, 3465, 3493, 3780, 4158, 4491, 4620, 4990, 5489, 5940, 5988, 6930, 6986, 7485, 8316, 8982, 9980, 10395, 10479, 10978, 13473, 13860, 13972, 14970, 16467, 17465, 17964, 20790, 20958, 21956, 22455, 26946, 27445, 29940, 31437, 32934, 34930, 38423, 41580, 41916, 44910, 49401, 52395, 53892, 54890, 62874, 65868, 67365, 69860, 76846, 82335, 89820, 94311, 98802, 104790, 109780, 115269, 125748, 134730, 148203, 153692, 157185, 164670, 188622, 192115, 197604, 209580, 230538, 247005, 269460, 296406, 314370, 329340, 345807, 377244, 384230, 461076, 471555, 494010, 576345, 592812, 628740, 691614, 741015, 768460, 943110, 988020, 1037421, 1152690, 1383228, 1482030, 1729035, 1886220, 2074842, 2305380, 2964060, 3458070, 4149684, 5187105, 6916140, 10374210, 20748420]

約数ペア:

[(1, 20748420), (2, 10374210), (3, 6916140), (4, 5187105), (5, 4149684), (6, 3458070), (7, 2964060), (9, 2305380), (10, 2074842), (11, 1886220), (12, 1729035), (14, 1482030), (15, 1383228), (18, 1152690), (20, 1037421), (21, 988020), (22, 943110), (27, 768460), (28, 741015), (30, 691614), (33, 628740), (35, 592812), (36, 576345), (42, 494010), (44, 471555), (45, 461076), (54, 384230), (55, 377244), (60, 345807), (63, 329340), (66, 314370), (70, 296406), (77, 269460), (84, 247005), (90, 230538), (99, 209580), (105, 197604), (108, 192115), (110, 188622), (126, 164670), (132, 157185), (135, 153692), (140, 148203), (154, 134730), (165, 125748), (180, 115269), (189, 109780), (198, 104790), (210, 98802), (220, 94311), (231, 89820), (252, 82335), (270, 76846), (297, 69860), (308, 67365), (315, 65868), (330, 62874), (378, 54890), (385, 53892), (396, 52395), (420, 49401), (462, 44910), (495, 41916), (499, 41580), (540, 38423), (594, 34930), (630, 32934), (660, 31437), (693, 29940), (756, 27445), (770, 26946), (924, 22455), (945, 21956), (990, 20958), (998, 20790), (1155, 17964), (1188, 17465), (1260, 16467), (1386, 14970), (1485, 13972), (1497, 13860), (1540, 13473), (1890, 10978), (1980, 10479), (1996, 10395), (2079, 9980), (2310, 8982), (2495, 8316), (2772, 7485), (2970, 6986), (2994, 6930), (3465, 5988), (3493, 5940), (3780, 5489), (4158, 4990), (4491, 4620)]