28163120

素因数分解:

$2^4\times 5^1\times {\mathrm{197}}^1\times {\mathrm{1787}}^1$

素因数の和:1997

約数の個数: 40

約数和(自身を含む): 65848464

約数和(自身を除く): 37685344

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 40, 80, 197, 394, 788, 985, 1576, 1787, 1970, 3152, 3574, 3940, 7148, 7880, 8935, 14296, 15760, 17870, 28592, 35740, 71480, 142960, 352039, 704078, 1408156, 1760195, 2816312, 3520390, 5632624, 7040780, 14081560, 28163120]

約数ペア:

[(1, 28163120), (2, 14081560), (4, 7040780), (5, 5632624), (8, 3520390), (10, 2816312), (16, 1760195), (20, 1408156), (40, 704078), (80, 352039), (197, 142960), (394, 71480), (788, 35740), (985, 28592), (1576, 17870), (1787, 15760), (1970, 14296), (3152, 8935), (3574, 7880), (3940, 7148)]