20797947

素因数分解:

$3^2\times {\mathrm{41}}^1\times {\mathrm{157}}^1\times {\mathrm{359}}^1$

素因数の和:563

約数の個数: 24

約数和(自身を含む): 31056480

約数和(自身を除く): 10258533

約数列:

[1, 3, 9, 41, 123, 157, 359, 369, 471, 1077, 1413, 3231, 6437, 14719, 19311, 44157, 56363, 57933, 132471, 169089, 507267, 2310883, 6932649, 20797947]

約数ペア:

[(1, 20797947), (3, 6932649), (9, 2310883), (41, 507267), (123, 169089), (157, 132471), (359, 57933), (369, 56363), (471, 44157), (1077, 19311), (1413, 14719), (3231, 6437)]