16920477

素因数分解:

$3^2\times 7^1\times {\mathrm{419}}^1\times {\mathrm{641}}^1$

素因数の和:1073

約数の個数: 24

約数和(自身を含む): 28042560

約数和(自身を除く): 11122083

約数列:

[1, 3, 7, 9, 21, 63, 419, 641, 1257, 1923, 2933, 3771, 4487, 5769, 8799, 13461, 26397, 40383, 268579, 805737, 1880053, 2417211, 5640159, 16920477]

約数ペア:

[(1, 16920477), (3, 5640159), (7, 2417211), (9, 1880053), (21, 805737), (63, 268579), (419, 40383), (641, 26397), (1257, 13461), (1923, 8799), (2933, 5769), (3771, 4487)]