28775780

素因数分解:

$2^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{941}}^1$

素因数の和:1100

約数の個数: 48

約数和(自身を含む): 66467520

約数和(自身を除く): 37691740

約数列:

[1, 2, 4, 5, 10, 11, 20, 22, 44, 55, 110, 139, 220, 278, 556, 695, 941, 1390, 1529, 1882, 2780, 3058, 3764, 4705, 6116, 7645, 9410, 10351, 15290, 18820, 20702, 30580, 41404, 51755, 103510, 130799, 207020, 261598, 523196, 653995, 1307990, 1438789, 2615980, 2877578, 5755156, 7193945, 14387890, 28775780]

約数ペア:

[(1, 28775780), (2, 14387890), (4, 7193945), (5, 5755156), (10, 2877578), (11, 2615980), (20, 1438789), (22, 1307990), (44, 653995), (55, 523196), (110, 261598), (139, 207020), (220, 130799), (278, 103510), (556, 51755), (695, 41404), (941, 30580), (1390, 20702), (1529, 18820), (1882, 15290), (2780, 10351), (3058, 9410), (3764, 7645), (4705, 6116)]