21152817

素因数分解:

$3^2\times 7^1\times {\mathrm{71}}^1\times {\mathrm{4729}}^1$

素因数の和:4813

約数の個数: 24

約数和(自身を含む): 35418240

約数和(自身を除く): 14265423

約数列:

[1, 3, 7, 9, 21, 63, 71, 213, 497, 639, 1491, 4473, 4729, 14187, 33103, 42561, 99309, 297927, 335759, 1007277, 2350313, 3021831, 7050939, 21152817]

約数ペア:

[(1, 21152817), (3, 7050939), (7, 3021831), (9, 2350313), (21, 1007277), (63, 335759), (71, 297927), (213, 99309), (497, 42561), (639, 33103), (1491, 14187), (4473, 4729)]