19955719

素因数分解:

$7^1\times {\mathrm{19}}^2\times {\mathrm{53}}^1\times {\mathrm{149}}^1$

素因数の和:247

約数の個数: 24

約数和(自身を含む): 24688800

約数和(自身を除く): 4733081

約数列:

[1, 7, 19, 53, 133, 149, 361, 371, 1007, 1043, 2527, 2831, 7049, 7897, 19133, 19817, 53789, 55279, 133931, 150043, 376523, 1050301, 2850817, 19955719]

約数ペア:

[(1, 19955719), (7, 2850817), (19, 1050301), (53, 376523), (133, 150043), (149, 133931), (361, 55279), (371, 53789), (1007, 19817), (1043, 19133), (2527, 7897), (2831, 7049)]