21528221

素因数分解:

${\mathrm{11}}^1\times {\mathrm{13}}^1\times {\mathrm{151}}^1\times {\mathrm{997}}^1$

素因数の和:1172

約数の個数: 16

約数和(自身を含む): 25484928

約数和(自身を除く): 3956707

約数列:

[1, 11, 13, 143, 151, 997, 1661, 1963, 10967, 12961, 21593, 142571, 150547, 1656017, 1957111, 21528221]

約数ペア:

[(1, 21528221), (11, 1957111), (13, 1656017), (143, 150547), (151, 142571), (997, 21593), (1661, 12961), (1963, 10967)]