18705519

素因数分解:

$3^3\times 7^1\times {\mathrm{19}}^1\times {\mathrm{5209}}^1$

素因数の和:5244

約数の個数: 32

約数和(自身を含む): 33344000

約数和(自身を除く): 14638481

約数列:

[1, 3, 7, 9, 19, 21, 27, 57, 63, 133, 171, 189, 399, 513, 1197, 3591, 5209, 15627, 36463, 46881, 98971, 109389, 140643, 296913, 328167, 692797, 890739, 984501, 2078391, 2672217, 6235173, 18705519]

約数ペア:

[(1, 18705519), (3, 6235173), (7, 2672217), (9, 2078391), (19, 984501), (21, 890739), (27, 692797), (57, 328167), (63, 296913), (133, 140643), (171, 109389), (189, 98971), (399, 46881), (513, 36463), (1197, 15627), (3591, 5209)]