256455

素因数分解:

$3^2\times 5^1\times {\mathrm{41}}^1\times {\mathrm{139}}^1$

素因数の和:191

約数の個数: 24

約数和(自身を含む): 458640

約数和(自身を除く): 202185

約数列:

[1, 3, 5, 9, 15, 41, 45, 123, 139, 205, 369, 417, 615, 695, 1251, 1845, 2085, 5699, 6255, 17097, 28495, 51291, 85485, 256455]

約数ペア:

[(1, 256455), (3, 85485), (5, 51291), (9, 28495), (15, 17097), (41, 6255), (45, 5699), (123, 2085), (139, 1845), (205, 1251), (369, 695), (417, 615)]