19813473

素因数分解:

$3^2\times {\mathrm{71}}^1\times {\mathrm{101}}^1\times {\mathrm{307}}^1$

素因数の和:485

約数の個数: 24

約数和(自身を含む): 29405376

約数和(自身を除く): 9591903

約数列:

[1, 3, 9, 71, 101, 213, 303, 307, 639, 909, 921, 2763, 7171, 21513, 21797, 31007, 64539, 65391, 93021, 196173, 279063, 2201497, 6604491, 19813473]

約数ペア:

[(1, 19813473), (3, 6604491), (9, 2201497), (71, 279063), (101, 196173), (213, 93021), (303, 65391), (307, 64539), (639, 31007), (909, 21797), (921, 21513), (2763, 7171)]