20307915

素因数分解:

$3^4\times 5^1\times {\mathrm{41}}^1\times {\mathrm{1223}}^1$

素因数の和:1281

約数の個数: 40

約数和(自身を含む): 37322208

約数和(自身を除く): 17014293

約数列:

[1, 3, 5, 9, 15, 27, 41, 45, 81, 123, 135, 205, 369, 405, 615, 1107, 1223, 1845, 3321, 3669, 5535, 6115, 11007, 16605, 18345, 33021, 50143, 55035, 99063, 150429, 165105, 250715, 451287, 495315, 752145, 1353861, 2256435, 4061583, 6769305, 20307915]

約数ペア:

[(1, 20307915), (3, 6769305), (5, 4061583), (9, 2256435), (15, 1353861), (27, 752145), (41, 495315), (45, 451287), (81, 250715), (123, 165105), (135, 150429), (205, 99063), (369, 55035), (405, 50143), (615, 33021), (1107, 18345), (1223, 16605), (1845, 11007), (3321, 6115), (3669, 5535)]