21356811

素因数分解:

$3^3\times 7^1\times {\mathrm{17}}^3\times {\mathrm{23}}^1$

素因数の和:90

約数の個数: 64

約数和(自身を含む): 40089600

約数和(自身を除く): 18732789

約数列:

[1, 3, 7, 9, 17, 21, 23, 27, 51, 63, 69, 119, 153, 161, 189, 207, 289, 357, 391, 459, 483, 621, 867, 1071, 1173, 1449, 2023, 2601, 2737, 3213, 3519, 4347, 4913, 6069, 6647, 7803, 8211, 10557, 14739, 18207, 19941, 24633, 34391, 44217, 46529, 54621, 59823, 73899, 103173, 112999, 132651, 139587, 179469, 309519, 338997, 418761, 790993, 928557, 1016991, 1256283, 2372979, 3050973, 7118937, 21356811]

約数ペア:

[(1, 21356811), (3, 7118937), (7, 3050973), (9, 2372979), (17, 1256283), (21, 1016991), (23, 928557), (27, 790993), (51, 418761), (63, 338997), (69, 309519), (119, 179469), (153, 139587), (161, 132651), (189, 112999), (207, 103173), (289, 73899), (357, 59823), (391, 54621), (459, 46529), (483, 44217), (621, 34391), (867, 24633), (1071, 19941), (1173, 18207), (1449, 14739), (2023, 10557), (2601, 8211), (2737, 7803), (3213, 6647), (3519, 6069), (4347, 4913)]