20902509

素因数分解:

$3^3\times {\mathrm{157}}^1\times {\mathrm{4931}}^1$

素因数の和:5097

約数の個数: 16

約数和(自身を含む): 31170240

約数和(自身を除く): 10267731

約数列:

[1, 3, 9, 27, 157, 471, 1413, 4239, 4931, 14793, 44379, 133137, 774167, 2322501, 6967503, 20902509]

約数ペア:

[(1, 20902509), (3, 6967503), (9, 2322501), (27, 774167), (157, 133137), (471, 44379), (1413, 14793), (4239, 4931)]