21777903

素因数分解:

$3^5\times 7^2\times {\mathrm{31}}^1\times {\mathrm{59}}^1$

素因数の和:119

約数の個数: 72

約数和(自身を含む): 39836160

約数和(自身を除く): 18058257

約数列:

[1, 3, 7, 9, 21, 27, 31, 49, 59, 63, 81, 93, 147, 177, 189, 217, 243, 279, 413, 441, 531, 567, 651, 837, 1239, 1323, 1519, 1593, 1701, 1829, 1953, 2511, 2891, 3717, 3969, 4557, 4779, 5487, 5859, 7533, 8673, 11151, 11907, 12803, 13671, 14337, 16461, 17577, 26019, 33453, 38409, 41013, 49383, 52731, 78057, 89621, 100359, 115227, 123039, 148149, 234171, 268863, 345681, 369117, 444447, 702513, 806589, 1037043, 2419767, 3111129, 7259301, 21777903]

約数ペア:

[(1, 21777903), (3, 7259301), (7, 3111129), (9, 2419767), (21, 1037043), (27, 806589), (31, 702513), (49, 444447), (59, 369117), (63, 345681), (81, 268863), (93, 234171), (147, 148149), (177, 123039), (189, 115227), (217, 100359), (243, 89621), (279, 78057), (413, 52731), (441, 49383), (531, 41013), (567, 38409), (651, 33453), (837, 26019), (1239, 17577), (1323, 16461), (1519, 14337), (1593, 13671), (1701, 12803), (1829, 11907), (1953, 11151), (2511, 8673), (2891, 7533), (3717, 5859), (3969, 5487), (4557, 4779)]