20688885

素因数分解:

$3^3\times 5^1\times 7^1\times {\mathrm{21893}}^1$

素因数の和:21914

約数の個数: 32

約数和(自身を含む): 42036480

約数和(自身を除く): 21347595

約数列:

[1, 3, 5, 7, 9, 15, 21, 27, 35, 45, 63, 105, 135, 189, 315, 945, 21893, 65679, 109465, 153251, 197037, 328395, 459753, 591111, 766255, 985185, 1379259, 2298765, 2955555, 4137777, 6896295, 20688885]

約数ペア:

[(1, 20688885), (3, 6896295), (5, 4137777), (7, 2955555), (9, 2298765), (15, 1379259), (21, 985185), (27, 766255), (35, 591111), (45, 459753), (63, 328395), (105, 197037), (135, 153251), (189, 109465), (315, 65679), (945, 21893)]