21178617

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{107}}^1\times {\mathrm{3881}}^1$

素因数の和:4008

約数の個数: 16

約数和(自身を含む): 30186432

約数和(自身を除く): 9007815

約数列:

[1, 3, 17, 51, 107, 321, 1819, 3881, 5457, 11643, 65977, 197931, 415267, 1245801, 7059539, 21178617]

約数ペア:

[(1, 21178617), (3, 7059539), (17, 1245801), (51, 415267), (107, 197931), (321, 65977), (1819, 11643), (3881, 5457)]