21660331

素因数分解:

$7^1\times {\mathrm{11}}^2\times {\mathrm{107}}^1\times {\mathrm{239}}^1$

素因数の和:375

約数の個数: 24

約数和(自身を含む): 27578880

約数和(自身を除く): 5918549

約数列:

[1, 7, 11, 77, 107, 121, 239, 749, 847, 1177, 1673, 2629, 8239, 12947, 18403, 25573, 28919, 90629, 179011, 202433, 281303, 1969121, 3094333, 21660331]

約数ペア:

[(1, 21660331), (7, 3094333), (11, 1969121), (77, 281303), (107, 202433), (121, 179011), (239, 90629), (749, 28919), (847, 25573), (1177, 18403), (1673, 12947), (2629, 8239)]