19785260

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{647}}^1$

素因数の和:806

約数の個数: 48

約数和(自身を含む): 45722880

約数和(自身を除く): 25937620

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 647, 695, 1294, 1390, 1529, 2588, 2780, 3058, 3235, 6116, 6470, 7117, 7645, 12940, 14234, 15290, 28468, 30580, 35585, 71170, 89933, 142340, 179866, 359732, 449665, 899330, 989263, 1798660, 1978526, 3957052, 4946315, 9892630, 19785260]

約数ペア:

[(1, 19785260), (2, 9892630), (4, 4946315), (5, 3957052), (10, 1978526), (11, 1798660), (20, 989263), (22, 899330), (44, 449665), (55, 359732), (110, 179866), (139, 142340), (220, 89933), (278, 71170), (556, 35585), (647, 30580), (695, 28468), (1294, 15290), (1390, 14234), (1529, 12940), (2588, 7645), (2780, 7117), (3058, 6470), (3235, 6116)]