21708507

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{19}}^1\times {\mathrm{43}}^1\times {\mathrm{521}}^1$

素因数の和:603

約数の個数: 32

約数和(自身を含む): 33073920

約数和(自身を除く): 11365413

約数列:

[1, 3, 17, 19, 43, 51, 57, 129, 323, 521, 731, 817, 969, 1563, 2193, 2451, 8857, 9899, 13889, 22403, 26571, 29697, 41667, 67209, 168283, 380851, 425657, 504849, 1142553, 1276971, 7236169, 21708507]

約数ペア:

[(1, 21708507), (3, 7236169), (17, 1276971), (19, 1142553), (43, 504849), (51, 425657), (57, 380851), (129, 168283), (323, 67209), (521, 41667), (731, 29697), (817, 26571), (969, 22403), (1563, 13889), (2193, 9899), (2451, 8857)]