21566979

素因数分解:

$3^5\times 7^1\times {\mathrm{31}}^1\times {\mathrm{409}}^1$

素因数の和:462

約数の個数: 48

約数和(自身を含む): 38205440

約数和(自身を除く): 16638461

約数列:

[1, 3, 7, 9, 21, 27, 31, 63, 81, 93, 189, 217, 243, 279, 409, 567, 651, 837, 1227, 1701, 1953, 2511, 2863, 3681, 5859, 7533, 8589, 11043, 12679, 17577, 25767, 33129, 38037, 52731, 77301, 88753, 99387, 114111, 231903, 266259, 342333, 695709, 798777, 1026999, 2396331, 3080997, 7188993, 21566979]

約数ペア:

[(1, 21566979), (3, 7188993), (7, 3080997), (9, 2396331), (21, 1026999), (27, 798777), (31, 695709), (63, 342333), (81, 266259), (93, 231903), (189, 114111), (217, 99387), (243, 88753), (279, 77301), (409, 52731), (567, 38037), (651, 33129), (837, 25767), (1227, 17577), (1701, 12679), (1953, 11043), (2511, 8589), (2863, 7533), (3681, 5859)]