21154007

素因数分解:

$7^1\times {\mathrm{61}}^1\times {\mathrm{107}}^1\times {\mathrm{463}}^1$

素因数の和:638

約数の個数: 16

約数和(自身を含む): 24855552

約数和(自身を除く): 3701545

約数列:

[1, 7, 61, 107, 427, 463, 749, 3241, 6527, 28243, 45689, 49541, 197701, 346787, 3022001, 21154007]

約数ペア:

[(1, 21154007), (7, 3022001), (61, 346787), (107, 197701), (427, 49541), (463, 45689), (749, 28243), (3241, 6527)]