20919249

素因数分解:

$3^3\times {\mathrm{13}}^1\times {\mathrm{107}}^1\times {\mathrm{557}}^1$

素因数の和:686

約数の個数: 32

約数和(自身を含む): 33747840

約数和(自身を除く): 12828591

約数列:

[1, 3, 9, 13, 27, 39, 107, 117, 321, 351, 557, 963, 1391, 1671, 2889, 4173, 5013, 7241, 12519, 15039, 21723, 37557, 59599, 65169, 178797, 195507, 536391, 774787, 1609173, 2324361, 6973083, 20919249]

約数ペア:

[(1, 20919249), (3, 6973083), (9, 2324361), (13, 1609173), (27, 774787), (39, 536391), (107, 195507), (117, 178797), (321, 65169), (351, 59599), (557, 37557), (963, 21723), (1391, 15039), (1671, 12519), (2889, 7241), (4173, 5013)]