21947505

素因数分解:

$3^1\times 5^1\times {\mathrm{41}}^1\times {\mathrm{127}}^1\times {\mathrm{281}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 36384768

約数和(自身を除く): 14437263

約数列:

[1, 3, 5, 15, 41, 123, 127, 205, 281, 381, 615, 635, 843, 1405, 1905, 4215, 5207, 11521, 15621, 26035, 34563, 35687, 57605, 78105, 107061, 172815, 178435, 535305, 1463167, 4389501, 7315835, 21947505]

約数ペア:

[(1, 21947505), (3, 7315835), (5, 4389501), (15, 1463167), (41, 535305), (123, 178435), (127, 172815), (205, 107061), (281, 78105), (381, 57605), (615, 35687), (635, 34563), (843, 26035), (1405, 15621), (1905, 11521), (4215, 5207)]