20578672

素因数分解:

$2^4\times {\mathrm{19}}^1\times {\mathrm{139}}^1\times {\mathrm{487}}^1$

素因数の和:653

約数の個数: 40

約数和(自身を含む): 42358400

約数和(自身を除く): 21779728

約数列:

[1, 2, 4, 8, 16, 19, 38, 76, 139, 152, 278, 304, 487, 556, 974, 1112, 1948, 2224, 2641, 3896, 5282, 7792, 9253, 10564, 18506, 21128, 37012, 42256, 67693, 74024, 135386, 148048, 270772, 541544, 1083088, 1286167, 2572334, 5144668, 10289336, 20578672]

約数ペア:

[(1, 20578672), (2, 10289336), (4, 5144668), (8, 2572334), (16, 1286167), (19, 1083088), (38, 541544), (76, 270772), (139, 148048), (152, 135386), (278, 74024), (304, 67693), (487, 42256), (556, 37012), (974, 21128), (1112, 18506), (1948, 10564), (2224, 9253), (2641, 7792), (3896, 5282)]