78800

素因数分解:

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

素因数の和:215

約数の個数: 30

約数和(自身を含む): 190278

約数和(自身を除く): 111478

約数列:

[1, 2, 4, 5, 8, 10, 16, 20, 25, 40, 50, 80, 100, 197, 200, 394, 400, 788, 985, 1576, 1970, 3152, 3940, 4925, 7880, 9850, 15760, 19700, 39400, 78800]

約数ペア:

[(1, 78800), (2, 39400), (4, 19700), (5, 15760), (8, 9850), (10, 7880), (16, 4925), (20, 3940), (25, 3152), (40, 1970), (50, 1576), (80, 985), (100, 788), (197, 400), (200, 394)]