20979495

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{83}}^1\times {\mathrm{137}}^1$

素因数の和:272

約数の個数: 48

約数和(自身を含む): 37975392

約数和(自身を除く): 16995897

約数列:

[1, 3, 5, 9, 15, 41, 45, 83, 123, 137, 205, 249, 369, 411, 415, 615, 685, 747, 1233, 1245, 1845, 2055, 3403, 3735, 5617, 6165, 10209, 11371, 16851, 17015, 28085, 30627, 34113, 50553, 51045, 56855, 84255, 102339, 153135, 170565, 252765, 466211, 511695, 1398633, 2331055, 4195899, 6993165, 20979495]

約数ペア:

[(1, 20979495), (3, 6993165), (5, 4195899), (9, 2331055), (15, 1398633), (41, 511695), (45, 466211), (83, 252765), (123, 170565), (137, 153135), (205, 102339), (249, 84255), (369, 56855), (411, 51045), (415, 50553), (615, 34113), (685, 30627), (747, 28085), (1233, 17015), (1245, 16851), (1845, 11371), (2055, 10209), (3403, 6165), (3735, 5617)]