19815543

素因数分解:

$3^3\times {\mathrm{11}}^1\times {\mathrm{137}}^1\times {\mathrm{487}}^1$

素因数の和:644

約数の個数: 32

約数和(自身を含む): 32325120

約数和(自身を除く): 12509577

約数列:

[1, 3, 9, 11, 27, 33, 99, 137, 297, 411, 487, 1233, 1461, 1507, 3699, 4383, 4521, 5357, 13149, 13563, 16071, 40689, 48213, 66719, 144639, 200157, 600471, 733909, 1801413, 2201727, 6605181, 19815543]

約数ペア:

[(1, 19815543), (3, 6605181), (9, 2201727), (11, 1801413), (27, 733909), (33, 600471), (99, 200157), (137, 144639), (297, 66719), (411, 48213), (487, 40689), (1233, 16071), (1461, 13563), (1507, 13149), (3699, 5357), (4383, 4521)]