20610920

素因数分解:

$2^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{139}}^1\times {\mathrm{337}}^1$

素因数の和:498

約数の個数: 64

約数和(自身を含む): 51105600

約数和(自身を除く): 30494680

約数列:

[1, 2, 4, 5, 8, 10, 11, 20, 22, 40, 44, 55, 88, 110, 139, 220, 278, 337, 440, 556, 674, 695, 1112, 1348, 1390, 1529, 1685, 2696, 2780, 3058, 3370, 3707, 5560, 6116, 6740, 7414, 7645, 12232, 13480, 14828, 15290, 18535, 29656, 30580, 37070, 46843, 61160, 74140, 93686, 148280, 187372, 234215, 374744, 468430, 515273, 936860, 1030546, 1873720, 2061092, 2576365, 4122184, 5152730, 10305460, 20610920]

約数ペア:

[(1, 20610920), (2, 10305460), (4, 5152730), (5, 4122184), (8, 2576365), (10, 2061092), (11, 1873720), (20, 1030546), (22, 936860), (40, 515273), (44, 468430), (55, 374744), (88, 234215), (110, 187372), (139, 148280), (220, 93686), (278, 74140), (337, 61160), (440, 46843), (556, 37070), (674, 30580), (695, 29656), (1112, 18535), (1348, 15290), (1390, 14828), (1529, 13480), (1685, 12232), (2696, 7645), (2780, 7414), (3058, 6740), (3370, 6116), (3707, 5560)]