21307671

素因数分解:

$3^3\times 7^1\times {\mathrm{11}}^1\times {\mathrm{37}}^1\times {\mathrm{277}}^1$

素因数の和:341

約数の個数: 64

約数和(自身を含む): 40565760

約数和(自身を除く): 19258089

約数列:

[1, 3, 7, 9, 11, 21, 27, 33, 37, 63, 77, 99, 111, 189, 231, 259, 277, 297, 333, 407, 693, 777, 831, 999, 1221, 1939, 2079, 2331, 2493, 2849, 3047, 3663, 5817, 6993, 7479, 8547, 9141, 10249, 10989, 17451, 21329, 25641, 27423, 30747, 52353, 63987, 71743, 76923, 82269, 92241, 112739, 191961, 215229, 276723, 338217, 575883, 645687, 789173, 1014651, 1937061, 2367519, 3043953, 7102557, 21307671]

約数ペア:

[(1, 21307671), (3, 7102557), (7, 3043953), (9, 2367519), (11, 1937061), (21, 1014651), (27, 789173), (33, 645687), (37, 575883), (63, 338217), (77, 276723), (99, 215229), (111, 191961), (189, 112739), (231, 92241), (259, 82269), (277, 76923), (297, 71743), (333, 63987), (407, 52353), (693, 30747), (777, 27423), (831, 25641), (999, 21329), (1221, 17451), (1939, 10989), (2079, 10249), (2331, 9141), (2493, 8547), (2849, 7479), (3047, 6993), (3663, 5817)]