19889120

素因数分解:

$2^5\times 5^1\times {\mathrm{197}}^1\times {\mathrm{631}}^1$

素因数の和:843

約数の個数: 48

約数和(自身を含む): 47301408

約数和(自身を除く): 27412288

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 32, 40, 80, 160, 197, 394, 631, 788, 985, 1262, 1576, 1970, 2524, 3152, 3155, 3940, 5048, 6304, 6310, 7880, 10096, 12620, 15760, 20192, 25240, 31520, 50480, 100960, 124307, 248614, 497228, 621535, 994456, 1243070, 1988912, 2486140, 3977824, 4972280, 9944560, 19889120]

約数ペア:

[(1, 19889120), (2, 9944560), (4, 4972280), (5, 3977824), (8, 2486140), (10, 1988912), (16, 1243070), (20, 994456), (32, 621535), (40, 497228), (80, 248614), (160, 124307), (197, 100960), (394, 50480), (631, 31520), (788, 25240), (985, 20192), (1262, 15760), (1576, 12620), (1970, 10096), (2524, 7880), (3152, 6310), (3155, 6304), (3940, 5048)]