21070449

素因数分解:

$3^4\times {\mathrm{19}}^1\times {\mathrm{13691}}^1$

素因数の和:13722

約数の個数: 20

約数和(自身を含む): 33134640

約数和(自身を除く): 12064191

約数列:

[1, 3, 9, 19, 27, 57, 81, 171, 513, 1539, 13691, 41073, 123219, 260129, 369657, 780387, 1108971, 2341161, 7023483, 21070449]

約数ペア:

[(1, 21070449), (3, 7023483), (9, 2341161), (19, 1108971), (27, 780387), (57, 369657), (81, 260129), (171, 123219), (513, 41073), (1539, 13691)]