399640460

素因数分解:

$2^2\times 5^1\times {\mathrm{79}}^1\times {\mathrm{252937}}^1$

素因数の和:253025

約数の個数: 24

約数和(自身を含む): 849871680

約数和(自身を除く): 450231220

約数列:

[1, 2, 4, 5, 10, 20, 79, 158, 316, 395, 790, 1580, 252937, 505874, 1011748, 1264685, 2529370, 5058740, 19982023, 39964046, 79928092, 99910115, 199820230, 399640460]

約数ペア:

[(1, 399640460), (2, 199820230), (4, 99910115), (5, 79928092), (10, 39964046), (20, 19982023), (79, 5058740), (158, 2529370), (316, 1264685), (395, 1011748), (790, 505874), (1580, 252937)]