21091313871

素因数分解:

$3^4\times {\mathrm{467}}^1\times {\mathrm{557573}}^1$

素因数の和:558052

約数の個数: 20

約数和(自身を含む): 31574300472

約数和(自身を除く): 10482986601

約数列:

[1, 3, 9, 27, 81, 467, 1401, 4203, 12609, 37827, 557573, 1672719, 5018157, 15054471, 45163413, 260386591, 781159773, 2343479319, 7030437957, 21091313871]

約数ペア:

[(1, 21091313871), (3, 7030437957), (9, 2343479319), (27, 781159773), (81, 260386591), (467, 45163413), (1401, 15054471), (4203, 5018157), (12609, 1672719), (37827, 557573)]