20671460

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2657}}^1$

素因数の和:3055

約数の個数: 24

約数和(自身を含む): 43538040

約数和(自身を除く): 22866580

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2657, 3890, 5314, 7780, 10628, 13285, 26570, 53140, 1033573, 2067146, 4134292, 5167865, 10335730, 20671460]

約数ペア:

[(1, 20671460), (2, 10335730), (4, 5167865), (5, 4134292), (10, 2067146), (20, 1033573), (389, 53140), (778, 26570), (1556, 13285), (1945, 10628), (2657, 7780), (3890, 5314)]