20477655

素因数分解:

$3^2\times 5^1\times {\mathrm{11}}^1\times {\mathrm{41}}^1\times {\mathrm{1009}}^1$

素因数の和:1072

約数の個数: 48

約数和(自身を含む): 39705120

約数和(自身を除く): 19227465

約数列:

[1, 3, 5, 9, 11, 15, 33, 41, 45, 55, 99, 123, 165, 205, 369, 451, 495, 615, 1009, 1353, 1845, 2255, 3027, 4059, 5045, 6765, 9081, 11099, 15135, 20295, 33297, 41369, 45405, 55495, 99891, 124107, 166485, 206845, 372321, 455059, 499455, 620535, 1365177, 1861605, 2275295, 4095531, 6825885, 20477655]

約数ペア:

[(1, 20477655), (3, 6825885), (5, 4095531), (9, 2275295), (11, 1861605), (15, 1365177), (33, 620535), (41, 499455), (45, 455059), (55, 372321), (99, 206845), (123, 166485), (165, 124107), (205, 99891), (369, 55495), (451, 45405), (495, 41369), (615, 33297), (1009, 20295), (1353, 15135), (1845, 11099), (2255, 9081), (3027, 6765), (4059, 5045)]