20487681

素因数分解:

$3^3\times {\mathrm{19}}^1\times {\mathrm{39937}}^1$

素因数の和:39965

約数の個数: 16

約数和(自身を含む): 31950400

約数和(自身を除く): 11462719

約数列:

[1, 3, 9, 19, 27, 57, 171, 513, 39937, 119811, 359433, 758803, 1078299, 2276409, 6829227, 20487681]

約数ペア:

[(1, 20487681), (3, 6829227), (9, 2276409), (19, 1078299), (27, 758803), (57, 359433), (171, 119811), (513, 39937)]