217863471

素因数分解:

$3^1\times 7^1\times {\mathrm{47}}^1\times {\mathrm{307}}^1\times {\mathrm{719}}^1$

素因数の和:1083

約数の個数: 32

約数和(自身を含む): 340623360

約数和(自身を除く): 122759889

約数列:

[1, 3, 7, 21, 47, 141, 307, 329, 719, 921, 987, 2149, 2157, 5033, 6447, 14429, 15099, 33793, 43287, 101003, 101379, 220733, 236551, 303009, 662199, 709653, 1545131, 4635393, 10374451, 31123353, 72621157, 217863471]

約数ペア:

[(1, 217863471), (3, 72621157), (7, 31123353), (21, 10374451), (47, 4635393), (141, 1545131), (307, 709653), (329, 662199), (719, 303009), (921, 236551), (987, 220733), (2149, 101379), (2157, 101003), (5033, 43287), (6447, 33793), (14429, 15099)]