20989995

素因数分解:

$3^1\times 5^1\times {\mathrm{13}}^1\times {\mathrm{107641}}^1$

素因数の和:107662

約数の個数: 16

約数和(自身を含む): 36167712

約数和(自身を除く): 15177717

約数列:

[1, 3, 5, 13, 15, 39, 65, 195, 107641, 322923, 538205, 1399333, 1614615, 4197999, 6996665, 20989995]

約数ペア:

[(1, 20989995), (3, 6996665), (5, 4197999), (13, 1614615), (15, 1399333), (39, 538205), (65, 322923), (195, 107641)]