18891903

素因数分解:

$3^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{907}}^1$

素因数の和:1094

約数の個数: 16

約数和(自身を含む): 25888896

約数和(自身を除く): 6996993

約数列:

[1, 3, 53, 131, 159, 393, 907, 2721, 6943, 20829, 48071, 118817, 144213, 356451, 6297301, 18891903]

約数ペア:

[(1, 18891903), (3, 6297301), (53, 356451), (131, 144213), (159, 118817), (393, 48071), (907, 20829), (2721, 6943)]