18920979

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{479}}^1$

素因数の和:525

約数の個数: 64

約数和(自身を含む): 36864000

約数和(自身を除く): 17943021

約数列:

[1, 3, 7, 9, 11, 19, 21, 27, 33, 57, 63, 77, 99, 133, 171, 189, 209, 231, 297, 399, 479, 513, 627, 693, 1197, 1437, 1463, 1881, 2079, 3353, 3591, 4311, 4389, 5269, 5643, 9101, 10059, 12933, 13167, 15807, 27303, 30177, 36883, 39501, 47421, 63707, 81909, 90531, 100111, 110649, 142263, 191121, 245727, 300333, 331947, 573363, 700777, 900999, 995841, 1720089, 2102331, 2702997, 6306993, 18920979]

約数ペア:

[(1, 18920979), (3, 6306993), (7, 2702997), (9, 2102331), (11, 1720089), (19, 995841), (21, 900999), (27, 700777), (33, 573363), (57, 331947), (63, 300333), (77, 245727), (99, 191121), (133, 142263), (171, 110649), (189, 100111), (209, 90531), (231, 81909), (297, 63707), (399, 47421), (479, 39501), (513, 36883), (627, 30177), (693, 27303), (1197, 15807), (1437, 13167), (1463, 12933), (1881, 10059), (2079, 9101), (3353, 5643), (3591, 5269), (4311, 4389)]