20902077

素因数分解:

$3^3\times 7^3\times {\mathrm{37}}^1\times {\mathrm{61}}^1$

素因数の和:128

約数の個数: 64

約数和(自身を含む): 37696000

約数和(自身を除く): 16793923

約数列:

[1, 3, 7, 9, 21, 27, 37, 49, 61, 63, 111, 147, 183, 189, 259, 333, 343, 427, 441, 549, 777, 999, 1029, 1281, 1323, 1647, 1813, 2257, 2331, 2989, 3087, 3843, 5439, 6771, 6993, 8967, 9261, 11529, 12691, 15799, 16317, 20313, 20923, 26901, 38073, 47397, 48951, 60939, 62769, 80703, 110593, 114219, 142191, 188307, 331779, 342657, 426573, 564921, 774151, 995337, 2322453, 2986011, 6967359, 20902077]

約数ペア:

[(1, 20902077), (3, 6967359), (7, 2986011), (9, 2322453), (21, 995337), (27, 774151), (37, 564921), (49, 426573), (61, 342657), (63, 331779), (111, 188307), (147, 142191), (183, 114219), (189, 110593), (259, 80703), (333, 62769), (343, 60939), (427, 48951), (441, 47397), (549, 38073), (777, 26901), (999, 20923), (1029, 20313), (1281, 16317), (1323, 15799), (1647, 12691), (1813, 11529), (2257, 9261), (2331, 8967), (2989, 6993), (3087, 6771), (3843, 5439)]