21891359

素因数分解:

$7^1\times {\mathrm{17}}^1\times {\mathrm{71}}^1\times {\mathrm{2591}}^1$

素因数の和:2686

約数の個数: 16

約数和(自身を含む): 26873856

約数和(自身を除く): 4982497

約数列:

[1, 7, 17, 71, 119, 497, 1207, 2591, 8449, 18137, 44047, 183961, 308329, 1287727, 3127337, 21891359]

約数ペア:

[(1, 21891359), (7, 3127337), (17, 1287727), (71, 308329), (119, 183961), (497, 44047), (1207, 18137), (2591, 8449)]