20831657

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{29}}^1\times {\mathrm{491}}^1$

素因数の和:557

約数の個数: 32

約数和(自身を含む): 28339200

約数和(自身を除く): 7507543

約数列:

[1, 7, 11, 19, 29, 77, 133, 203, 209, 319, 491, 551, 1463, 2233, 3437, 3857, 5401, 6061, 9329, 14239, 37807, 42427, 65303, 99673, 102619, 156629, 270541, 718333, 1096403, 1893787, 2975951, 20831657]

約数ペア:

[(1, 20831657), (7, 2975951), (11, 1893787), (19, 1096403), (29, 718333), (77, 270541), (133, 156629), (203, 102619), (209, 99673), (319, 65303), (491, 42427), (551, 37807), (1463, 14239), (2233, 9329), (3437, 6061), (3857, 5401)]