16720263

素因数分解:

$3^4\times 7^1\times {\mathrm{37}}^1\times {\mathrm{797}}^1$

素因数の和:853

約数の個数: 40

約数和(自身を含む): 29353632

約数和(自身を除く): 12633369

約数列:

[1, 3, 7, 9, 21, 27, 37, 63, 81, 111, 189, 259, 333, 567, 777, 797, 999, 2331, 2391, 2997, 5579, 6993, 7173, 16737, 20979, 21519, 29489, 50211, 64557, 88467, 150633, 206423, 265401, 451899, 619269, 796203, 1857807, 2388609, 5573421, 16720263]

約数ペア:

[(1, 16720263), (3, 5573421), (7, 2388609), (9, 1857807), (21, 796203), (27, 619269), (37, 451899), (63, 265401), (81, 206423), (111, 150633), (189, 88467), (259, 64557), (333, 50211), (567, 29489), (777, 21519), (797, 20979), (999, 16737), (2331, 7173), (2391, 6993), (2997, 5579)]