28408820

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{929}}^1$

素因数の和:1088

約数の個数: 48

約数和(自身を含む): 65620800

約数和(自身を除く): 37211980

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 695, 929, 1390, 1529, 1858, 2780, 3058, 3716, 4645, 6116, 7645, 9290, 10219, 15290, 18580, 20438, 30580, 40876, 51095, 102190, 129131, 204380, 258262, 516524, 645655, 1291310, 1420441, 2582620, 2840882, 5681764, 7102205, 14204410, 28408820]

約数ペア:

[(1, 28408820), (2, 14204410), (4, 7102205), (5, 5681764), (10, 2840882), (11, 2582620), (20, 1420441), (22, 1291310), (44, 645655), (55, 516524), (110, 258262), (139, 204380), (220, 129131), (278, 102190), (556, 51095), (695, 40876), (929, 30580), (1390, 20438), (1529, 18580), (1858, 15290), (2780, 10219), (3058, 9290), (3716, 7645), (4645, 6116)]