20987085

素因数分解:

$3^1\times 5^1\times 7^1\times {\mathrm{199877}}^1$

素因数の和:199892

約数の個数: 16

約数和(自身を含む): 38376576

約数和(自身を除く): 17389491

約数列:

[1, 3, 5, 7, 15, 21, 35, 105, 199877, 599631, 999385, 1399139, 2998155, 4197417, 6995695, 20987085]

約数ペア:

[(1, 20987085), (3, 6995695), (5, 4197417), (7, 2998155), (15, 1399139), (21, 999385), (35, 599631), (105, 199877)]