21152509

素因数分解:

$7^1\times {\mathrm{31}}^1\times {\mathrm{107}}^1\times {\mathrm{911}}^1$

素因数の和:1056

約数の個数: 16

約数和(自身を含む): 25214976

約数和(自身を除く): 4062467

約数列:

[1, 7, 31, 107, 217, 749, 911, 3317, 6377, 23219, 28241, 97477, 197687, 682339, 3021787, 21152509]

約数ペア:

[(1, 21152509), (7, 3021787), (31, 682339), (107, 197687), (217, 97477), (749, 28241), (911, 23219), (3317, 6377)]