18986481

素因数分解:

$3^4\times {\mathrm{157}}^1\times {\mathrm{1493}}^1$

素因数の和:1662

約数の個数: 20

約数和(自身を含む): 28562292

約数和(自身を除く): 9575811

約数列:

[1, 3, 9, 27, 81, 157, 471, 1413, 1493, 4239, 4479, 12717, 13437, 40311, 120933, 234401, 703203, 2109609, 6328827, 18986481]

約数ペア:

[(1, 18986481), (3, 6328827), (9, 2109609), (27, 703203), (81, 234401), (157, 120933), (471, 40311), (1413, 13437), (1493, 12717), (4239, 4479)]