20518245

素因数分解:

$3^3\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{337}}^1$

素因数の和:403

約数の個数: 64

約数和(自身を含む): 40884480

約数和(自身を除く): 20366235

約数列:

[1, 3, 5, 9, 11, 15, 27, 33, 41, 45, 55, 99, 123, 135, 165, 205, 297, 337, 369, 451, 495, 615, 1011, 1107, 1353, 1485, 1685, 1845, 2255, 3033, 3707, 4059, 5055, 5535, 6765, 9099, 11121, 12177, 13817, 15165, 18535, 20295, 33363, 41451, 45495, 55605, 60885, 69085, 100089, 124353, 151987, 166815, 207255, 373059, 455961, 500445, 621765, 759935, 1367883, 1865295, 2279805, 4103649, 6839415, 20518245]

約数ペア:

[(1, 20518245), (3, 6839415), (5, 4103649), (9, 2279805), (11, 1865295), (15, 1367883), (27, 759935), (33, 621765), (41, 500445), (45, 455961), (55, 373059), (99, 207255), (123, 166815), (135, 151987), (165, 124353), (205, 100089), (297, 69085), (337, 60885), (369, 55605), (451, 45495), (495, 41451), (615, 33363), (1011, 20295), (1107, 18535), (1353, 15165), (1485, 13817), (1685, 12177), (1845, 11121), (2255, 9099), (3033, 6765), (3707, 5535), (4059, 5055)]