128178256

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{421639}}^1$

素因数の和:421666

約数の個数: 20

約数和(自身を含む): 261416800

約数和(自身を除く): 133238544

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 152, 304, 421639, 843278, 1686556, 3373112, 6746224, 8011141, 16022282, 32044564, 64089128, 128178256]

約数ペア:

[(1, 128178256), (2, 64089128), (4, 32044564), (8, 16022282), (16, 8011141), (19, 6746224), (38, 3373112), (76, 1686556), (152, 843278), (304, 421639)]