21812481

素因数分解:

$3^2\times {\mathrm{43}}^1\times {\mathrm{157}}^1\times {\mathrm{359}}^1$

素因数の和:565

約数の個数: 24

約数和(自身を含む): 32535360

約数和(自身を除く): 10722879

約数列:

[1, 3, 9, 43, 129, 157, 359, 387, 471, 1077, 1413, 3231, 6751, 15437, 20253, 46311, 56363, 60759, 138933, 169089, 507267, 2423609, 7270827, 21812481]

約数ペア:

[(1, 21812481), (3, 7270827), (9, 2423609), (43, 507267), (129, 169089), (157, 138933), (359, 60759), (387, 56363), (471, 46311), (1077, 20253), (1413, 15437), (3231, 6751)]