20987613

素因数分解:

$3^3\times {\mathrm{41}}^1\times {\mathrm{18959}}^1$

素因数の和:19009

約数の個数: 16

約数和(自身を含む): 31852800

約数和(自身を除く): 10865187

約数列:

[1, 3, 9, 27, 41, 123, 369, 1107, 18959, 56877, 170631, 511893, 777319, 2331957, 6995871, 20987613]

約数ペア:

[(1, 20987613), (3, 6995871), (9, 2331957), (27, 777319), (41, 511893), (123, 170631), (369, 56877), (1107, 18959)]