21561321

素因数分解:

$3^1\times {\mathrm{17}}^1\times {\mathrm{419}}^1\times {\mathrm{1009}}^1$

素因数の和:1448

約数の個数: 16

約数和(自身を含む): 30542400

約数和(自身を除く): 8981079

約数列:

[1, 3, 17, 51, 419, 1009, 1257, 3027, 7123, 17153, 21369, 51459, 422771, 1268313, 7187107, 21561321]

約数ペア:

[(1, 21561321), (3, 7187107), (17, 1268313), (51, 422771), (419, 51459), (1009, 21369), (1257, 17153), (3027, 7123)]