20387780

素因数分解:

$2^2\times 5^1\times 7^1\times {\mathrm{107}}^1\times {\mathrm{1361}}^1$

素因数の和:1484

約数の個数: 48

約数和(自身を含む): 49424256

約数和(自身を除く): 29036476

約数列:

[1, 2, 4, 5, 7, 10, 14, 20, 28, 35, 70, 107, 140, 214, 428, 535, 749, 1070, 1361, 1498, 2140, 2722, 2996, 3745, 5444, 6805, 7490, 9527, 13610, 14980, 19054, 27220, 38108, 47635, 95270, 145627, 190540, 291254, 582508, 728135, 1019389, 1456270, 2038778, 2912540, 4077556, 5096945, 10193890, 20387780]

約数ペア:

[(1, 20387780), (2, 10193890), (4, 5096945), (5, 4077556), (7, 2912540), (10, 2038778), (14, 1456270), (20, 1019389), (28, 728135), (35, 582508), (70, 291254), (107, 190540), (140, 145627), (214, 95270), (428, 47635), (535, 38108), (749, 27220), (1070, 19054), (1361, 14980), (1498, 13610), (2140, 9527), (2722, 7490), (2996, 6805), (3745, 5444)]