18939381

素因数分解:

$3^1\times {\mathrm{79}}^1\times {\mathrm{157}}^1\times {\mathrm{509}}^1$

素因数の和:748

約数の個数: 16

約数和(自身を含む): 25785600

約数和(自身を除く): 6846219

約数列:

[1, 3, 79, 157, 237, 471, 509, 1527, 12403, 37209, 40211, 79913, 120633, 239739, 6313127, 18939381]

約数ペア:

[(1, 18939381), (3, 6313127), (79, 239739), (157, 120633), (237, 79913), (471, 40211), (509, 37209), (1527, 12403)]