19956489

素因数分解:

$3^1\times 7^1\times {\mathrm{97}}^2\times {\mathrm{101}}^1$

素因数の和:305

約数の個数: 24

約数和(自身を含む): 31030848

約数和(自身を除く): 11074359

約数列:

[1, 3, 7, 21, 97, 101, 291, 303, 679, 707, 2037, 2121, 9409, 9797, 28227, 29391, 65863, 68579, 197589, 205737, 950309, 2850927, 6652163, 19956489]

約数ペア:

[(1, 19956489), (3, 6652163), (7, 2850927), (21, 950309), (97, 205737), (101, 197589), (291, 68579), (303, 65863), (679, 29391), (707, 28227), (2037, 9797), (2121, 9409)]