21955521

素因数分解:

$3^1\times 7^1\times {\mathrm{571}}^1\times {\mathrm{1831}}^1$

素因数の和:2412

約数の個数: 16

約数和(自身を含む): 33532928

約数和(自身を除く): 11577407

約数列:

[1, 3, 7, 21, 571, 1713, 1831, 3997, 5493, 11991, 12817, 38451, 1045501, 3136503, 7318507, 21955521]

約数ペア:

[(1, 21955521), (3, 7318507), (7, 3136503), (21, 1045501), (571, 38451), (1713, 12817), (1831, 11991), (3997, 5493)]