21267213

素因数分解:

$3^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{107}}^1\times {\mathrm{317}}^1$

素因数の和:457

約数の個数: 32

約数和(自身を含む): 32970240

約数和(自身を除く): 11703027

約数列:

[1, 3, 11, 19, 33, 57, 107, 209, 317, 321, 627, 951, 1177, 2033, 3487, 3531, 6023, 6099, 10461, 18069, 22363, 33919, 66253, 67089, 101757, 198759, 373109, 644461, 1119327, 1933383, 7089071, 21267213]

約数ペア:

[(1, 21267213), (3, 7089071), (11, 1933383), (19, 1119327), (33, 644461), (57, 373109), (107, 198759), (209, 101757), (317, 67089), (321, 66253), (627, 33919), (951, 22363), (1177, 18069), (2033, 10461), (3487, 6099), (3531, 6023)]