21195559

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{71}}^1\times {\mathrm{3877}}^1$

素因数の和:3966

約数の個数: 16

約数和(自身を含む): 26804736

約数和(自身を除く): 5609177

約数列:

[1, 7, 11, 71, 77, 497, 781, 3877, 5467, 27139, 42647, 275267, 298529, 1926869, 3027937, 21195559]

約数ペア:

[(1, 21195559), (7, 3027937), (11, 1926869), (71, 298529), (77, 275267), (497, 42647), (781, 27139), (3877, 5467)]