21018921

素因数分解:

$3^1\times 7^1\times {\mathrm{11}}^1\times {\mathrm{19}}^1\times {\mathrm{4789}}^1$

素因数の和:4829

約数の個数: 32

約数和(自身を含む): 36787200

約数和(自身を除く): 15768279

約数列:

[1, 3, 7, 11, 19, 21, 33, 57, 77, 133, 209, 231, 399, 627, 1463, 4389, 4789, 14367, 33523, 52679, 90991, 100569, 158037, 272973, 368753, 636937, 1000901, 1106259, 1910811, 3002703, 7006307, 21018921]

約数ペア:

[(1, 21018921), (3, 7006307), (7, 3002703), (11, 1910811), (19, 1106259), (21, 1000901), (33, 636937), (57, 368753), (77, 272973), (133, 158037), (209, 100569), (231, 90991), (399, 52679), (627, 33523), (1463, 14367), (4389, 4789)]