20298971

素因数分解:

$7^1\times {\mathrm{11}}^1\times {\mathrm{47}}^1\times {\mathrm{71}}^1\times {\mathrm{79}}^1$

素因数の和:215

約数の個数: 32

約数和(自身を含む): 26542080

約数和(自身を除く): 6243109

約数列:

[1, 7, 11, 47, 71, 77, 79, 329, 497, 517, 553, 781, 869, 3337, 3619, 3713, 5467, 5609, 6083, 23359, 25991, 36707, 39263, 40843, 61699, 256949, 263623, 285901, 431893, 1845361, 2899853, 20298971]

約数ペア:

[(1, 20298971), (7, 2899853), (11, 1845361), (47, 431893), (71, 285901), (77, 263623), (79, 256949), (329, 61699), (497, 40843), (517, 39263), (553, 36707), (781, 25991), (869, 23359), (3337, 6083), (3619, 5609), (3713, 5467)]