21421836

素因数分解:

$2^2\times 3^2\times {\mathrm{17}}^2\times {\mathrm{29}}^1\times {\mathrm{71}}^1$

素因数の和:144

約数の個数: 108

約数和(自身を含む): 60343920

約数和(自身を除く): 38922084

約数列:

[1, 2, 3, 4, 6, 9, 12, 17, 18, 29, 34, 36, 51, 58, 68, 71, 87, 102, 116, 142, 153, 174, 204, 213, 261, 284, 289, 306, 348, 426, 493, 522, 578, 612, 639, 852, 867, 986, 1044, 1156, 1207, 1278, 1479, 1734, 1972, 2059, 2414, 2556, 2601, 2958, 3468, 3621, 4118, 4437, 4828, 5202, 5916, 6177, 7242, 8236, 8381, 8874, 10404, 10863, 12354, 14484, 16762, 17748, 18531, 20519, 21726, 24708, 25143, 33524, 35003, 37062, 41038, 43452, 50286, 61557, 70006, 74124, 75429, 82076, 100572, 105009, 123114, 140012, 150858, 184671, 210018, 246228, 301716, 315027, 369342, 420036, 595051, 630054, 738684, 1190102, 1260108, 1785153, 2380204, 3570306, 5355459, 7140612, 10710918, 21421836]

約数ペア:

[(1, 21421836), (2, 10710918), (3, 7140612), (4, 5355459), (6, 3570306), (9, 2380204), (12, 1785153), (17, 1260108), (18, 1190102), (29, 738684), (34, 630054), (36, 595051), (51, 420036), (58, 369342), (68, 315027), (71, 301716), (87, 246228), (102, 210018), (116, 184671), (142, 150858), (153, 140012), (174, 123114), (204, 105009), (213, 100572), (261, 82076), (284, 75429), (289, 74124), (306, 70006), (348, 61557), (426, 50286), (493, 43452), (522, 41038), (578, 37062), (612, 35003), (639, 33524), (852, 25143), (867, 24708), (986, 21726), (1044, 20519), (1156, 18531), (1207, 17748), (1278, 16762), (1479, 14484), (1734, 12354), (1972, 10863), (2059, 10404), (2414, 8874), (2556, 8381), (2601, 8236), (2958, 7242), (3468, 6177), (3621, 5916), (4118, 5202), (4437, 4828)]