19846780

素因数分解:

$2^2\times 5^1\times {\mathrm{389}}^1\times {\mathrm{2551}}^1$

素因数の和:2949

約数の個数: 24

約数和(自身を含む): 41801760

約数和(自身を除く): 21954980

約数列:

[1, 2, 4, 5, 10, 20, 389, 778, 1556, 1945, 2551, 3890, 5102, 7780, 10204, 12755, 25510, 51020, 992339, 1984678, 3969356, 4961695, 9923390, 19846780]

約数ペア:

[(1, 19846780), (2, 9923390), (4, 4961695), (5, 3969356), (10, 1984678), (20, 992339), (389, 51020), (778, 25510), (1556, 12755), (1945, 10204), (2551, 7780), (3890, 5102)]