18916659

素因数分解:

$3^4\times {\mathrm{409}}^1\times {\mathrm{571}}^1$

素因数の和:992

約数の個数: 20

約数和(自身を含む): 28376920

約数和(自身を除く): 9460261

約数列:

[1, 3, 9, 27, 81, 409, 571, 1227, 1713, 3681, 5139, 11043, 15417, 33129, 46251, 233539, 700617, 2101851, 6305553, 18916659]

約数ペア:

[(1, 18916659), (3, 6305553), (9, 2101851), (27, 700617), (81, 233539), (409, 46251), (571, 33129), (1227, 15417), (1713, 11043), (3681, 5139)]