81139120

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{53381}}^1$

素因数の和:53413

約数の個数: 40

約数和(自身を含む): 198581040

約数和(自身を除く): 117441920

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 76, 80, 95, 152, 190, 304, 380, 760, 1520, 53381, 106762, 213524, 266905, 427048, 533810, 854096, 1014239, 1067620, 2028478, 2135240, 4056956, 4270480, 5071195, 8113912, 10142390, 16227824, 20284780, 40569560, 81139120]

約数ペア:

[(1, 81139120), (2, 40569560), (4, 20284780), (5, 16227824), (8, 10142390), (10, 8113912), (16, 5071195), (19, 4270480), (20, 4056956), (38, 2135240), (40, 2028478), (76, 1067620), (80, 1014239), (95, 854096), (152, 533810), (190, 427048), (304, 266905), (380, 213524), (760, 106762), (1520, 53381)]