18647721

素因数分解:

$3^2\times {\mathrm{19}}^1\times {\mathrm{167}}^1\times {\mathrm{653}}^1$

素因数の和:845

約数の個数: 24

約数和(自身を含む): 28566720

約数和(自身を除く): 9918999

約数列:

[1, 3, 9, 19, 57, 167, 171, 501, 653, 1503, 1959, 3173, 5877, 9519, 12407, 28557, 37221, 109051, 111663, 327153, 981459, 2071969, 6215907, 18647721]

約数ペア:

[(1, 18647721), (3, 6215907), (9, 2071969), (19, 981459), (57, 327153), (167, 111663), (171, 109051), (501, 37221), (653, 28557), (1503, 12407), (1959, 9519), (3173, 5877)]