21516759

素因数分解:

$3^4\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{31}}^1\times {\mathrm{41}}^1$

素因数の和:114

約数の個数: 80

約数和(自身を含む): 39029760

約数和(自身を除く): 17513001

約数列:

[1, 3, 9, 11, 19, 27, 31, 33, 41, 57, 81, 93, 99, 123, 171, 209, 279, 297, 341, 369, 451, 513, 589, 627, 779, 837, 891, 1023, 1107, 1271, 1353, 1539, 1767, 1881, 2337, 2511, 3069, 3321, 3813, 4059, 5301, 5643, 6479, 7011, 8569, 9207, 11439, 12177, 13981, 15903, 16929, 19437, 21033, 24149, 25707, 27621, 34317, 36531, 41943, 47709, 58311, 63099, 72447, 77121, 102951, 125829, 174933, 217341, 231363, 265639, 377487, 524799, 652023, 694089, 796917, 1132461, 1956069, 2390751, 7172253, 21516759]

約数ペア:

[(1, 21516759), (3, 7172253), (9, 2390751), (11, 1956069), (19, 1132461), (27, 796917), (31, 694089), (33, 652023), (41, 524799), (57, 377487), (81, 265639), (93, 231363), (99, 217341), (123, 174933), (171, 125829), (209, 102951), (279, 77121), (297, 72447), (341, 63099), (369, 58311), (451, 47709), (513, 41943), (589, 36531), (627, 34317), (779, 27621), (837, 25707), (891, 24149), (1023, 21033), (1107, 19437), (1271, 16929), (1353, 15903), (1539, 13981), (1767, 12177), (1881, 11439), (2337, 9207), (2511, 8569), (3069, 7011), (3321, 6479), (3813, 5643), (4059, 5301)]