21455357

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{73}}^1\times {\mathrm{347}}^1$

素因数の和:449

約数の個数: 24

約数和(自身を含む): 27400128

約数和(自身を除く): 5944771

約数列:

[1, 7, 11, 73, 77, 121, 347, 511, 803, 847, 2429, 3817, 5621, 8833, 25331, 26719, 41987, 61831, 177317, 278641, 293909, 1950487, 3065051, 21455357]

約数ペア:

[(1, 21455357), (7, 3065051), (11, 1950487), (73, 293909), (77, 278641), (121, 177317), (347, 61831), (511, 41987), (803, 26719), (847, 25331), (2429, 8833), (3817, 5621)]