21704155

素因数分解:

$5^1\times {\mathrm{11}}^1\times {\mathrm{17}}^1\times {\mathrm{139}}^1\times {\mathrm{167}}^1$

素因数の和:339

約数の個数: 32

約数和(自身を含む): 30481920

約数和(自身を除く): 8777765

約数列:

[1, 5, 11, 17, 55, 85, 139, 167, 187, 695, 835, 935, 1529, 1837, 2363, 2839, 7645, 9185, 11815, 14195, 23213, 25993, 31229, 116065, 129965, 156145, 255343, 394621, 1276715, 1973105, 4340831, 21704155]

約数ペア:

[(1, 21704155), (5, 4340831), (11, 1973105), (17, 1276715), (55, 394621), (85, 255343), (139, 156145), (167, 129965), (187, 116065), (695, 31229), (835, 25993), (935, 23213), (1529, 14195), (1837, 11815), (2363, 9185), (2839, 7645)]