21216657

素因数分解:

$3^1\times 7^2\times {\mathrm{11}}^1\times {\mathrm{13121}}^1$

素因数の和:13149

約数の個数: 24

約数和(自身を含む): 35901792

約数和(自身を除く): 14685135

約数列:

[1, 3, 7, 11, 21, 33, 49, 77, 147, 231, 539, 1617, 13121, 39363, 91847, 144331, 275541, 432993, 642929, 1010317, 1928787, 3030951, 7072219, 21216657]

約数ペア:

[(1, 21216657), (3, 7072219), (7, 3030951), (11, 1928787), (21, 1010317), (33, 642929), (49, 432993), (77, 275541), (147, 144331), (231, 91847), (539, 39363), (1617, 13121)]