20491389

素因数分解:

$3^2\times {\mathrm{47}}^1\times {\mathrm{193}}^1\times {\mathrm{251}}^1$

素因数の和:497

約数の個数: 24

約数和(自身を含む): 30506112

約数和(自身を除く): 10014723

約数列:

[1, 3, 9, 47, 141, 193, 251, 423, 579, 753, 1737, 2259, 9071, 11797, 27213, 35391, 48443, 81639, 106173, 145329, 435987, 2276821, 6830463, 20491389]

約数ペア:

[(1, 20491389), (3, 6830463), (9, 2276821), (47, 435987), (141, 145329), (193, 106173), (251, 81639), (423, 48443), (579, 35391), (753, 27213), (1737, 11797), (2259, 9071)]