21179691

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{83}}^1\times {\mathrm{727}}^1$

素因数の和:832

約数の個数: 32

約数和(自身を含む): 34245120

約数和(自身を除く): 13065429

約数列:

[1, 3, 9, 13, 27, 39, 83, 117, 249, 351, 727, 747, 1079, 2181, 2241, 3237, 6543, 9451, 9711, 19629, 28353, 29133, 60341, 85059, 181023, 255177, 543069, 784433, 1629207, 2353299, 7059897, 21179691]

約数ペア:

[(1, 21179691), (3, 7059897), (9, 2353299), (13, 1629207), (27, 784433), (39, 543069), (83, 255177), (117, 181023), (249, 85059), (351, 60341), (727, 29133), (747, 28353), (1079, 19629), (2181, 9711), (2241, 9451), (3237, 6543)]