21143949

素因数分解:

$3^1\times {\mathrm{107}}^1\times {\mathrm{199}}^1\times {\mathrm{331}}^1$

素因数の和:640

約数の個数: 16

約数和(自身を含む): 28684800

約数和(自身を除く): 7540851

約数列:

[1, 3, 107, 199, 321, 331, 597, 993, 21293, 35417, 63879, 65869, 106251, 197607, 7047983, 21143949]

約数ペア:

[(1, 21143949), (3, 7047983), (107, 197607), (199, 106251), (321, 65869), (331, 63879), (597, 35417), (993, 21293)]