21379305

素因数分解:

$3^1\times 5^1\times {\mathrm{23}}^1\times {\mathrm{31}}^1\times {\mathrm{1999}}^1$

素因数の和:2061

約数の個数: 32

約数和(自身を含む): 36864000

約数和(自身を除く): 15484695

約数列:

[1, 3, 5, 15, 23, 31, 69, 93, 115, 155, 345, 465, 713, 1999, 2139, 3565, 5997, 9995, 10695, 29985, 45977, 61969, 137931, 185907, 229885, 309845, 689655, 929535, 1425287, 4275861, 7126435, 21379305]

約数ペア:

[(1, 21379305), (3, 7126435), (5, 4275861), (15, 1425287), (23, 929535), (31, 689655), (69, 309845), (93, 229885), (115, 185907), (155, 137931), (345, 61969), (465, 45977), (713, 29985), (1999, 10695), (2139, 9995), (3565, 5997)]