21412287

素因数分解:

$3^2\times {\mathrm{13}}^1\times {\mathrm{23}}^1\times {\mathrm{73}}^1\times {\mathrm{109}}^1$

素因数の和:224

約数の個数: 48

約数和(自身を含む): 35555520

約数和(自身を除く): 14143233

約数列:

[1, 3, 9, 13, 23, 39, 69, 73, 109, 117, 207, 219, 299, 327, 657, 897, 949, 981, 1417, 1679, 2507, 2691, 2847, 4251, 5037, 7521, 7957, 8541, 12753, 15111, 21827, 22563, 23871, 32591, 65481, 71613, 97773, 103441, 183011, 196443, 293319, 310323, 549033, 930969, 1647099, 2379143, 7137429, 21412287]

約数ペア:

[(1, 21412287), (3, 7137429), (9, 2379143), (13, 1647099), (23, 930969), (39, 549033), (69, 310323), (73, 293319), (109, 196443), (117, 183011), (207, 103441), (219, 97773), (299, 71613), (327, 65481), (657, 32591), (897, 23871), (949, 22563), (981, 21827), (1417, 15111), (1679, 12753), (2507, 8541), (2691, 7957), (2847, 7521), (4251, 5037)]