20640669

素因数分解:

$3^1\times 7^1\times {\mathrm{17}}^2\times {\mathrm{19}}^1\times {\mathrm{179}}^1$

素因数の和:242

約数の個数: 48

約数和(自身を含む): 35366400

約数和(自身を除く): 14725731

約数列:

[1, 3, 7, 17, 19, 21, 51, 57, 119, 133, 179, 289, 323, 357, 399, 537, 867, 969, 1253, 2023, 2261, 3043, 3401, 3759, 5491, 6069, 6783, 9129, 10203, 16473, 21301, 23807, 38437, 51731, 57817, 63903, 71421, 115311, 155193, 173451, 362117, 404719, 982889, 1086351, 1214157, 2948667, 6880223, 20640669]

約数ペア:

[(1, 20640669), (3, 6880223), (7, 2948667), (17, 1214157), (19, 1086351), (21, 982889), (51, 404719), (57, 362117), (119, 173451), (133, 155193), (179, 115311), (289, 71421), (323, 63903), (357, 57817), (399, 51731), (537, 38437), (867, 23807), (969, 21301), (1253, 16473), (2023, 10203), (2261, 9129), (3043, 6783), (3401, 6069), (3759, 5491)]