21125664

素因数分解:

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

素因数の和:532

約数の個数: 144

約数和(自身を含む): 71820000

約数和(自身を除く): 50694336

約数列:

[1, 2, 3, 4, 6, 7, 8, 9, 12, 14, 16, 18, 21, 24, 27, 28, 32, 36, 42, 48, 49, 54, 56, 63, 72, 84, 96, 98, 108, 112, 126, 144, 147, 168, 189, 196, 216, 224, 252, 288, 294, 336, 378, 392, 432, 441, 499, 504, 588, 672, 756, 784, 864, 882, 998, 1008, 1176, 1323, 1497, 1512, 1568, 1764, 1996, 2016, 2352, 2646, 2994, 3024, 3493, 3528, 3992, 4491, 4704, 5292, 5988, 6048, 6986, 7056, 7984, 8982, 10479, 10584, 11976, 13473, 13972, 14112, 15968, 17964, 20958, 21168, 23952, 24451, 26946, 27944, 31437, 35928, 41916, 42336, 47904, 48902, 53892, 55888, 62874, 71856, 73353, 83832, 94311, 97804, 107784, 111776, 125748, 143712, 146706, 167664, 188622, 195608, 215568, 220059, 251496, 293412, 335328, 377244, 391216, 431136, 440118, 502992, 586824, 660177, 754488, 782432, 880236, 1005984, 1173648, 1320354, 1508976, 1760472, 2347296, 2640708, 3017952, 3520944, 5281416, 7041888, 10562832, 21125664]

約数ペア:

[(1, 21125664), (2, 10562832), (3, 7041888), (4, 5281416), (6, 3520944), (7, 3017952), (8, 2640708), (9, 2347296), (12, 1760472), (14, 1508976), (16, 1320354), (18, 1173648), (21, 1005984), (24, 880236), (27, 782432), (28, 754488), (32, 660177), (36, 586824), (42, 502992), (48, 440118), (49, 431136), (54, 391216), (56, 377244), (63, 335328), (72, 293412), (84, 251496), (96, 220059), (98, 215568), (108, 195608), (112, 188622), (126, 167664), (144, 146706), (147, 143712), (168, 125748), (189, 111776), (196, 107784), (216, 97804), (224, 94311), (252, 83832), (288, 73353), (294, 71856), (336, 62874), (378, 55888), (392, 53892), (432, 48902), (441, 47904), (499, 42336), (504, 41916), (588, 35928), (672, 31437), (756, 27944), (784, 26946), (864, 24451), (882, 23952), (998, 21168), (1008, 20958), (1176, 17964), (1323, 15968), (1497, 14112), (1512, 13972), (1568, 13473), (1764, 11976), (1996, 10584), (2016, 10479), (2352, 8982), (2646, 7984), (2994, 7056), (3024, 6986), (3493, 6048), (3528, 5988), (3992, 5292), (4491, 4704)]