28139181

素因数分解:

$3^1\times 7^2\times {\mathrm{107}}^1\times {\mathrm{1789}}^1$

素因数の和:1913

約数の個数: 24

約数和(自身を含む): 44076960

約数和(自身を除く): 15937779

約数列:

[1, 3, 7, 21, 49, 107, 147, 321, 749, 1789, 2247, 5243, 5367, 12523, 15729, 37569, 87661, 191423, 262983, 574269, 1339961, 4019883, 9379727, 28139181]

約数ペア:

[(1, 28139181), (3, 9379727), (7, 4019883), (21, 1339961), (49, 574269), (107, 262983), (147, 191423), (321, 87661), (749, 37569), (1789, 15729), (2247, 12523), (5243, 5367)]