21249903

素因数分解:

$3^1\times {\mathrm{131}}^1\times {\mathrm{139}}^1\times {\mathrm{389}}^1$

素因数の和:662

約数の個数: 16

約数和(自身を含む): 28828800

約数和(自身を除く): 7578897

約数列:

[1, 3, 131, 139, 389, 393, 417, 1167, 18209, 50959, 54071, 54627, 152877, 162213, 7083301, 21249903]

約数ペア:

[(1, 21249903), (3, 7083301), (131, 162213), (139, 152877), (389, 54627), (393, 54071), (417, 50959), (1167, 18209)]